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llvm-project/llvm/test/CodeGen/ARM/arm-shrink-wrapping.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc %s -o - -enable-shrink-wrap=true -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -mtriple=armv7-apple-ios \
; RUN: | FileCheck %s --check-prefix=ARM-ENABLE
; RUN: llc %s -o - -enable-shrink-wrap=false -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -mtriple=armv7-apple-ios \
; RUN: | FileCheck %s --check-prefix=ARM-DISABLE
; RUN: llc %s -o - -enable-shrink-wrap=true -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -mtriple=thumbv7-apple-ios \
; RUN: | FileCheck %s --check-prefix=THUMB-ENABLE
; RUN: llc %s -o - -enable-shrink-wrap=false -ifcvt-fn-start=1 -ifcvt-fn-stop=0 -mtriple=thumbv7-apple-ios \
; RUN: | FileCheck %s --check-prefix=THUMB-DISABLE
;
; Note: Lots of tests use inline asm instead of regular calls.
; This allows to have a better control on what the allocation will do.
; Otherwise, we may have spill right in the entry block, defeating
; shrink-wrapping. Moreover, some of the inline asm statements (nop)
; are here to ensure that the related paths do not end up as critical
; edges.
; Also disable the late if-converter as it makes harder to reason on
; the diffs.
; Initial motivating example: Simple diamond with a call just on one side.
; foo:
;
; Compare the arguments and jump to exit.
; No prologue needed.
; cmp r0, r1
; bge [[EXIT_LABEL:LBB[0-9_]+]]
;
; Prologue code.
; push {r7, lr}
; mov r7, sp
;;
; Compare the arguments and jump to exit.
; After the prologue is set.
; sub sp
; cmp r0, r1
; bge [[EXIT_LABEL:LBB[0-9_]+]]
;
; Store %a in the alloca.
; push {r0}
; str r0, [sp, #-4]
; str r0, [sp]
; Set the alloca address in the second argument.
; mov r1, sp
; Set the first argument to zero.
; mov{{s?}} r0, #0
; bl{{x?}} _doSomething
;
; With shrink-wrapping, epilogue is just after the call.
; mov sp, r7
; add sp, #4
; pop{{(\.w)?}} {r7, lr}
;
; [[EXIT_LABEL]]:
;
; Without shrink-wrapping, epilogue is in the exit block.
; Epilogue code. (What we pop does not matter.)
; mov sp, r7
; add sp,
; pop {r7, pc}
;
; bx lr
define i32 @foo(i32 %a, i32 %b) "frame-pointer"="all" {
; ARM-ENABLE-LABEL: foo:
; ARM-ENABLE: @ %bb.0:
; ARM-ENABLE-NEXT: cmp r0, r1
; ARM-ENABLE-NEXT: bge LBB0_2
; ARM-ENABLE-NEXT: @ %bb.1: @ %true
; ARM-ENABLE-NEXT: push {r7, lr}
; ARM-ENABLE-NEXT: mov r7, sp
; ARM-ENABLE-NEXT: push {r0}
; ARM-ENABLE-NEXT: mov r1, sp
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: bl _doSomething
; ARM-ENABLE-NEXT: mov sp, r7
; ARM-ENABLE-NEXT: pop {r7, lr}
; ARM-ENABLE-NEXT: LBB0_2: @ %false
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: foo:
; ARM-DISABLE: @ %bb.0:
; ARM-DISABLE-NEXT: push {r7, lr}
; ARM-DISABLE-NEXT: mov r7, sp
; ARM-DISABLE-NEXT: sub sp, sp, #4
; ARM-DISABLE-NEXT: cmp r0, r1
; ARM-DISABLE-NEXT: bge LBB0_2
; ARM-DISABLE-NEXT: @ %bb.1: @ %true
; ARM-DISABLE-NEXT: str r0, [sp]
; ARM-DISABLE-NEXT: mov r1, sp
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: bl _doSomething
; ARM-DISABLE-NEXT: LBB0_2: @ %false
; ARM-DISABLE-NEXT: mov sp, r7
; ARM-DISABLE-NEXT: pop {r7, pc}
;
; THUMB-ENABLE-LABEL: foo:
; THUMB-ENABLE: @ %bb.0:
; THUMB-ENABLE-NEXT: cmp r0, r1
; THUMB-ENABLE-NEXT: bge LBB0_2
; THUMB-ENABLE-NEXT: @ %bb.1: @ %true
; THUMB-ENABLE-NEXT: push {r7, lr}
; THUMB-ENABLE-NEXT: mov r7, sp
; THUMB-ENABLE-NEXT: str r0, [sp, #-4]!
; THUMB-ENABLE-NEXT: mov r1, sp
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: bl _doSomething
; THUMB-ENABLE-NEXT: add sp, #4
; THUMB-ENABLE-NEXT: pop.w {r7, lr}
; THUMB-ENABLE-NEXT: LBB0_2: @ %false
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: foo:
; THUMB-DISABLE: @ %bb.0:
; THUMB-DISABLE-NEXT: push {r7, lr}
; THUMB-DISABLE-NEXT: mov r7, sp
; THUMB-DISABLE-NEXT: sub sp, #4
; THUMB-DISABLE-NEXT: cmp r0, r1
; THUMB-DISABLE-NEXT: bge LBB0_2
; THUMB-DISABLE-NEXT: @ %bb.1: @ %true
; THUMB-DISABLE-NEXT: str r0, [sp]
; THUMB-DISABLE-NEXT: mov r1, sp
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: bl _doSomething
; THUMB-DISABLE-NEXT: LBB0_2: @ %false
; THUMB-DISABLE-NEXT: add sp, #4
; THUMB-DISABLE-NEXT: pop {r7, pc}
%tmp = alloca i32, align 4
%tmp2 = icmp slt i32 %a, %b
br i1 %tmp2, label %true, label %false
true:
store i32 %a, i32* %tmp, align 4
%tmp4 = call i32 @doSomething(i32 0, i32* %tmp)
br label %false
false:
%tmp.0 = phi i32 [ %tmp4, %true ], [ %a, %0 ]
ret i32 %tmp.0
}
; Function Attrs: optsize
declare i32 @doSomething(i32, i32*)
; Check that we do not perform the restore inside the loop whereas the save
; is outside.
; freqSaveAndRestoreOutsideLoop:
;
; Shrink-wrapping allows to skip the prologue in the else case.
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; Prologue code.
; Make sure we save the CSR used in the inline asm: r4.
; push {r4, r7, lr}
; add r7, sp, #4
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; SUM is in r0 because it is coalesced with the second
; argument on the else path.
; mov{{s?}} [[SUM:r0]], #0
; mov{{s?}} [[IV:r[0-9]+]], #10
;
; Next BB.
; [[LOOP:LBB[0-9_]+]]: @ %for.body
; mov{{(\.w)?}} [[TMP:r[0-9]+]], #1
; add [[SUM]], [[TMP]], [[SUM]]
; add [[SUM]], [[TMP]]
; subs [[IV]], [[IV]], #1
; subs [[IV]], #1
; bne [[LOOP]]
;
; Next BB.
; SUM << 3.
; lsl{{s?}} [[SUM]], [[SUM]], #3
; pop {r4, r7, pc}
;
; Duplicated epilogue.
; pop {r4, r7, pc}
;
; [[ELSE_LABEL]]: @ %if.else
; Shift second argument by one and store into returned register.
; lsl{{s?}} r0, r1, #1
; pop {r4, r7, pc}
;
; bx lr
define i32 @freqSaveAndRestoreOutsideLoop(i32 %cond, i32 %N) "frame-pointer"="all" {
; ARM-ENABLE-LABEL: freqSaveAndRestoreOutsideLoop:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: beq LBB1_4
; ARM-ENABLE-NEXT: @ %bb.1: @ %for.preheader
; ARM-ENABLE-NEXT: push {r4, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #4
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: mov r1, #10
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: LBB1_2: @ %for.body
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: mov r2, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: add r0, r2, r0
; ARM-ENABLE-NEXT: subs r1, r1, #1
; ARM-ENABLE-NEXT: bne LBB1_2
; ARM-ENABLE-NEXT: @ %bb.3: @ %for.end
; ARM-ENABLE-NEXT: lsl r0, r0, #3
; ARM-ENABLE-NEXT: pop {r4, r7, pc}
; ARM-ENABLE-NEXT: LBB1_4: @ %if.else
; ARM-ENABLE-NEXT: lsl r0, r1, #1
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: freqSaveAndRestoreOutsideLoop:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #4
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: beq LBB1_4
; ARM-DISABLE-NEXT: @ %bb.1: @ %for.preheader
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: mov r1, #10
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: LBB1_2: @ %for.body
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: mov r2, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: add r0, r2, r0
; ARM-DISABLE-NEXT: subs r1, r1, #1
; ARM-DISABLE-NEXT: bne LBB1_2
; ARM-DISABLE-NEXT: @ %bb.3: @ %for.end
; ARM-DISABLE-NEXT: lsl r0, r0, #3
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
; ARM-DISABLE-NEXT: LBB1_4: @ %if.else
; ARM-DISABLE-NEXT: lsl r0, r1, #1
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
;
; THUMB-ENABLE-LABEL: freqSaveAndRestoreOutsideLoop:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: cbz r0, LBB1_4
; THUMB-ENABLE-NEXT: @ %bb.1: @ %for.preheader
; THUMB-ENABLE-NEXT: push {r4, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #4
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: movs r1, #10
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: LBB1_2: @ %for.body
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: mov.w r2, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: add r0, r2
; THUMB-ENABLE-NEXT: subs r1, #1
; THUMB-ENABLE-NEXT: bne LBB1_2
; THUMB-ENABLE-NEXT: @ %bb.3: @ %for.end
; THUMB-ENABLE-NEXT: lsls r0, r0, #3
; THUMB-ENABLE-NEXT: pop {r4, r7, pc}
; THUMB-ENABLE-NEXT: LBB1_4: @ %if.else
; THUMB-ENABLE-NEXT: lsls r0, r1, #1
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: freqSaveAndRestoreOutsideLoop:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #4
; THUMB-DISABLE-NEXT: cbz r0, LBB1_4
; THUMB-DISABLE-NEXT: @ %bb.1: @ %for.preheader
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: movs r1, #10
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: LBB1_2: @ %for.body
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: mov.w r2, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: add r0, r2
; THUMB-DISABLE-NEXT: subs r1, #1
; THUMB-DISABLE-NEXT: bne LBB1_2
; THUMB-DISABLE-NEXT: @ %bb.3: @ %for.end
; THUMB-DISABLE-NEXT: lsls r0, r0, #3
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
; THUMB-DISABLE-NEXT: LBB1_4: @ %if.else
; THUMB-DISABLE-NEXT: lsls r0, r1, #1
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %entry, %for.body
%i.05 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
%sum.04 = phi i32 [ %add, %for.body ], [ 0, %for.preheader ]
%call = tail call i32 asm sideeffect "mov $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.04
%inc = add nuw nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
%shl = shl i32 %add, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %for.end
%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
ret i32 %sum.1
}
declare i32 @something(...)
; Check that we do not perform the shrink-wrapping inside the loop even
; though that would be legal. The cost model must prevent that.
; freqSaveAndRestoreOutsideLoop2:
; Prologue code.
; Make sure we save the CSR used in the inline asm: r4.
; push {r4
; mov{{s?}} [[SUM:r0]], #0
; mov{{s?}} [[IV:r[0-9]+]], #10
; nop
; Next BB.
; [[LOOP_LABEL:LBB[0-9_]+]]: @ %for.body
; mov{{(\.w)?}} [[TMP:r[0-9]+]], #1
; add [[SUM]], [[TMP]], [[SUM]]
; add [[SUM]], [[TMP]]
; subs [[IV]], [[IV]], #1
; subs [[IV]], #1
; bne [[LOOP_LABEL]]
; Next BB.
; @ %for.exit
; nop
; pop {r4
define i32 @freqSaveAndRestoreOutsideLoop2(i32 %cond) "frame-pointer"="all" {
; ARM-LABEL: freqSaveAndRestoreOutsideLoop2:
; ARM: @ %bb.0: @ %entry
; ARM-NEXT: push {r4, r7, lr}
; ARM-NEXT: add r7, sp, #4
; ARM-NEXT: mov r0, #0
; ARM-NEXT: mov r1, #10
; ARM-NEXT: @ InlineAsm Start
; ARM-NEXT: nop
; ARM-NEXT: @ InlineAsm End
; ARM-NEXT: LBB2_1: @ %for.body
; ARM-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-NEXT: @ InlineAsm Start
; ARM-NEXT: mov r2, #1
; ARM-NEXT: @ InlineAsm End
; ARM-NEXT: add r0, r2, r0
; ARM-NEXT: subs r1, r1, #1
; ARM-NEXT: bne LBB2_1
; ARM-NEXT: @ %bb.2: @ %for.exit
; ARM-NEXT: @ InlineAsm Start
; ARM-NEXT: nop
; ARM-NEXT: @ InlineAsm End
; ARM-NEXT: pop {r4, r7, pc}
;
; THUMB-LABEL: freqSaveAndRestoreOutsideLoop2:
; THUMB: @ %bb.0: @ %entry
; THUMB-NEXT: push {r4, r7, lr}
; THUMB-NEXT: add r7, sp, #4
; THUMB-NEXT: movs r0, #0
; THUMB-NEXT: movs r1, #10
; THUMB-NEXT: @ InlineAsm Start
; THUMB-NEXT: nop
; THUMB-NEXT: @ InlineAsm End
; THUMB-NEXT: LBB2_1: @ %for.body
; THUMB-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-NEXT: @ InlineAsm Start
; THUMB-NEXT: mov.w r2, #1
; THUMB-NEXT: @ InlineAsm End
; THUMB-NEXT: add r0, r2
; THUMB-NEXT: subs r1, #1
; THUMB-NEXT: bne LBB2_1
; THUMB-NEXT: @ %bb.2: @ %for.exit
; THUMB-NEXT: @ InlineAsm Start
; THUMB-NEXT: nop
; THUMB-NEXT: @ InlineAsm End
; THUMB-NEXT: pop {r4, r7, pc}
; ARM-ENABLE-LABEL: freqSaveAndRestoreOutsideLoop2:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: push {r4, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #4
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: mov r1, #10
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: LBB2_1: @ %for.body
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: mov r2, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: add r0, r2, r0
; ARM-ENABLE-NEXT: subs r1, r1, #1
; ARM-ENABLE-NEXT: bne LBB2_1
; ARM-ENABLE-NEXT: @ %bb.2: @ %for.exit
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: pop {r4, r7, pc}
;
; ARM-DISABLE-LABEL: freqSaveAndRestoreOutsideLoop2:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #4
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: mov r1, #10
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: LBB2_1: @ %for.body
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: mov r2, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: add r0, r2, r0
; ARM-DISABLE-NEXT: subs r1, r1, #1
; ARM-DISABLE-NEXT: bne LBB2_1
; ARM-DISABLE-NEXT: @ %bb.2: @ %for.exit
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
;
; THUMB-ENABLE-LABEL: freqSaveAndRestoreOutsideLoop2:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: push {r4, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #4
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: movs r1, #10
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: LBB2_1: @ %for.body
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: mov.w r2, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: add r0, r2
; THUMB-ENABLE-NEXT: subs r1, #1
; THUMB-ENABLE-NEXT: bne LBB2_1
; THUMB-ENABLE-NEXT: @ %bb.2: @ %for.exit
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: pop {r4, r7, pc}
;
; THUMB-DISABLE-LABEL: freqSaveAndRestoreOutsideLoop2:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #4
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: movs r1, #10
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: LBB2_1: @ %for.body
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: mov.w r2, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: add r0, r2
; THUMB-DISABLE-NEXT: subs r1, #1
; THUMB-DISABLE-NEXT: bne LBB2_1
; THUMB-DISABLE-NEXT: @ %bb.2: @ %for.exit
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
entry:
br label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %for.body, %entry
%i.04 = phi i32 [ 0, %for.preheader ], [ %inc, %for.body ]
%sum.03 = phi i32 [ 0, %for.preheader ], [ %add, %for.body ]
%call = tail call i32 asm sideeffect "mov $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.03
%inc = add nuw nsw i32 %i.04, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.exit, label %for.body
for.exit:
tail call void asm "nop", ""()
br label %for.end
for.end: ; preds = %for.body
ret i32 %add
}
; Check with a more complex case that we do not have save within the loop and
; restore outside.
; loopInfoSaveOutsideLoop:
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; Prologue code.
; Make sure we save the CSR used in the inline asm: r4.
; push {r4, r7, lr}
; add r7, sp, #4
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; SUM is in r0 because it is coalesced with the second
; argument on the else path.
; mov{{s?}} [[SUM:r0]], #0
; mov{{s?}} [[IV:r[0-9]+]], #10
;
; Next BB.
; [[LOOP:LBB[0-9_]+]]: @ %for.body
; mov{{(\.w)?}} [[TMP:r[0-9]+]], #1
; add [[SUM]], [[TMP]], [[SUM]]
; add [[SUM]], [[TMP]]
; subs [[IV]], [[IV]], #1
; subs [[IV]], #1
; bne [[LOOP]]
;
; Next BB.
; SUM << 3.
; lsl{{s?}} [[SUM]], [[SUM]], #3
; pop {r4, r7, pc}
;
; Duplicated epilogue.
; pop {r4, r7, pc}
;
; [[ELSE_LABEL]]: @ %if.else
; Shift second argument by one and store into returned register.
; lsl{{s?}} r0, r1, #1
; pop {r4, r7, pc}
;
; bx lr
define i32 @loopInfoSaveOutsideLoop(i32 %cond, i32 %N) "frame-pointer"="all" {
; ARM-ENABLE-LABEL: loopInfoSaveOutsideLoop:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: beq LBB3_4
; ARM-ENABLE-NEXT: @ %bb.1: @ %for.preheader
; ARM-ENABLE-NEXT: push {r4, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #4
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: mov r1, #10
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: LBB3_2: @ %for.body
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: mov r2, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: add r0, r2, r0
; ARM-ENABLE-NEXT: subs r1, r1, #1
; ARM-ENABLE-NEXT: bne LBB3_2
; ARM-ENABLE-NEXT: @ %bb.3: @ %for.end
; ARM-ENABLE-NEXT: lsl r0, r0, #3
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: pop {r4, r7, pc}
; ARM-ENABLE-NEXT: LBB3_4: @ %if.else
; ARM-ENABLE-NEXT: lsl r0, r1, #1
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: loopInfoSaveOutsideLoop:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #4
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: beq LBB3_4
; ARM-DISABLE-NEXT: @ %bb.1: @ %for.preheader
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: mov r1, #10
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: LBB3_2: @ %for.body
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: mov r2, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: add r0, r2, r0
; ARM-DISABLE-NEXT: subs r1, r1, #1
; ARM-DISABLE-NEXT: bne LBB3_2
; ARM-DISABLE-NEXT: @ %bb.3: @ %for.end
; ARM-DISABLE-NEXT: lsl r0, r0, #3
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
; ARM-DISABLE-NEXT: LBB3_4: @ %if.else
; ARM-DISABLE-NEXT: lsl r0, r1, #1
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
;
; THUMB-ENABLE-LABEL: loopInfoSaveOutsideLoop:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: cbz r0, LBB3_4
; THUMB-ENABLE-NEXT: @ %bb.1: @ %for.preheader
; THUMB-ENABLE-NEXT: push {r4, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #4
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: movs r1, #10
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: LBB3_2: @ %for.body
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: mov.w r2, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: add r0, r2
; THUMB-ENABLE-NEXT: subs r1, #1
; THUMB-ENABLE-NEXT: bne LBB3_2
; THUMB-ENABLE-NEXT: @ %bb.3: @ %for.end
; THUMB-ENABLE-NEXT: lsls r0, r0, #3
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: pop {r4, r7, pc}
; THUMB-ENABLE-NEXT: LBB3_4: @ %if.else
; THUMB-ENABLE-NEXT: lsls r0, r1, #1
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: loopInfoSaveOutsideLoop:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #4
; THUMB-DISABLE-NEXT: cbz r0, LBB3_4
; THUMB-DISABLE-NEXT: @ %bb.1: @ %for.preheader
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: movs r1, #10
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: LBB3_2: @ %for.body
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: mov.w r2, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: add r0, r2
; THUMB-DISABLE-NEXT: subs r1, #1
; THUMB-DISABLE-NEXT: bne LBB3_2
; THUMB-DISABLE-NEXT: @ %bb.3: @ %for.end
; THUMB-DISABLE-NEXT: lsls r0, r0, #3
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
; THUMB-DISABLE-NEXT: LBB3_4: @ %if.else
; THUMB-DISABLE-NEXT: lsls r0, r1, #1
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %entry, %for.body
%i.05 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
%sum.04 = phi i32 [ %add, %for.body ], [ 0, %for.preheader ]
%call = tail call i32 asm sideeffect "mov $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.04
%inc = add nuw nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
tail call void asm "nop", "~{r4}"()
%shl = shl i32 %add, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %for.end
%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
ret i32 %sum.1
}
declare void @somethingElse(...)
; Check with a more complex case that we do not have restore within the loop and
; save outside.
; loopInfoRestoreOutsideLoop:
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; Prologue code.
; Make sure we save the CSR used in the inline asm: r4.
; push {r4, r7, lr}
; add r7, sp, #4
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; SUM is in r0 because it is coalesced with the second
; argument on the else path.
; mov{{s?}} [[SUM:r0]], #0
; mov{{s?}} [[IV:r[0-9]+]], #10
;
; Next BB.
; [[LOOP:LBB[0-9_]+]]: @ %for.body
; mov{{(\.w)?}} [[TMP:r[0-9]+]], #1
; add [[SUM]], [[TMP]], [[SUM]]
; add [[SUM]], [[TMP]]
; subs [[IV]], [[IV]], #1
; subs [[IV]], #1
; bne [[LOOP]]
;
; Next BB.
; SUM << 3.
; lsl{{s?}} [[SUM]], [[SUM]], #3
; pop {r4, r7, pc}
;
; Duplicated epilogue.
; pop {r4, r7, pc}
;
; [[ELSE_LABEL]]: @ %if.else
; Shift second argument by one and store into returned register.
; lsl{{s?}} r0, r1, #1
; pop {r4, r7, pc}
;
; bx lr
define i32 @loopInfoRestoreOutsideLoop(i32 %cond, i32 %N) "frame-pointer"="all" nounwind {
; ARM-ENABLE-LABEL: loopInfoRestoreOutsideLoop:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: beq LBB4_4
; ARM-ENABLE-NEXT: @ %bb.1: @ %if.then
; ARM-ENABLE-NEXT: push {r4, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #4
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: mov r1, #10
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: LBB4_2: @ %for.body
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: mov r2, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: add r0, r2, r0
; ARM-ENABLE-NEXT: subs r1, r1, #1
; ARM-ENABLE-NEXT: bne LBB4_2
; ARM-ENABLE-NEXT: @ %bb.3: @ %for.end
; ARM-ENABLE-NEXT: lsl r0, r0, #3
; ARM-ENABLE-NEXT: pop {r4, r7, pc}
; ARM-ENABLE-NEXT: LBB4_4: @ %if.else
; ARM-ENABLE-NEXT: lsl r0, r1, #1
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: loopInfoRestoreOutsideLoop:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #4
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: beq LBB4_4
; ARM-DISABLE-NEXT: @ %bb.1: @ %if.then
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: mov r1, #10
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: LBB4_2: @ %for.body
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: mov r2, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: add r0, r2, r0
; ARM-DISABLE-NEXT: subs r1, r1, #1
; ARM-DISABLE-NEXT: bne LBB4_2
; ARM-DISABLE-NEXT: @ %bb.3: @ %for.end
; ARM-DISABLE-NEXT: lsl r0, r0, #3
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
; ARM-DISABLE-NEXT: LBB4_4: @ %if.else
; ARM-DISABLE-NEXT: lsl r0, r1, #1
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
;
; THUMB-ENABLE-LABEL: loopInfoRestoreOutsideLoop:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: cbz r0, LBB4_4
; THUMB-ENABLE-NEXT: @ %bb.1: @ %if.then
; THUMB-ENABLE-NEXT: push {r4, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #4
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: movs r1, #10
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: LBB4_2: @ %for.body
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: mov.w r2, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: add r0, r2
; THUMB-ENABLE-NEXT: subs r1, #1
; THUMB-ENABLE-NEXT: bne LBB4_2
; THUMB-ENABLE-NEXT: @ %bb.3: @ %for.end
; THUMB-ENABLE-NEXT: lsls r0, r0, #3
; THUMB-ENABLE-NEXT: pop {r4, r7, pc}
; THUMB-ENABLE-NEXT: LBB4_4: @ %if.else
; THUMB-ENABLE-NEXT: lsls r0, r1, #1
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: loopInfoRestoreOutsideLoop:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #4
; THUMB-DISABLE-NEXT: cbz r0, LBB4_4
; THUMB-DISABLE-NEXT: @ %bb.1: @ %if.then
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: movs r1, #10
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: LBB4_2: @ %for.body
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: mov.w r2, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: add r0, r2
; THUMB-DISABLE-NEXT: subs r1, #1
; THUMB-DISABLE-NEXT: bne LBB4_2
; THUMB-DISABLE-NEXT: @ %bb.3: @ %for.end
; THUMB-DISABLE-NEXT: lsls r0, r0, #3
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
; THUMB-DISABLE-NEXT: LBB4_4: @ %if.else
; THUMB-DISABLE-NEXT: lsls r0, r1, #1
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %if.then
if.then: ; preds = %entry
tail call void asm "nop", "~{r4}"()
br label %for.body
for.body: ; preds = %for.body, %if.then
%i.05 = phi i32 [ 0, %if.then ], [ %inc, %for.body ]
%sum.04 = phi i32 [ 0, %if.then ], [ %add, %for.body ]
%call = tail call i32 asm sideeffect "mov $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.04
%inc = add nuw nsw i32 %i.05, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
%shl = shl i32 %add, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %for.end
%sum.1 = phi i32 [ %shl, %for.end ], [ %mul, %if.else ]
ret i32 %sum.1
}
; Check that we handle function with no frame information correctly.
; emptyFrame:
; @ %entry
; mov{{s?}} r0, #0
; bx lr
define i32 @emptyFrame() {
; ARM-LABEL: emptyFrame:
; ARM: @ %bb.0: @ %entry
; ARM-NEXT: mov r0, #0
; ARM-NEXT: bx lr
;
; THUMB-LABEL: emptyFrame:
; THUMB: @ %bb.0: @ %entry
; THUMB-NEXT: movs r0, #0
; THUMB-NEXT: bx lr
; ARM-ENABLE-LABEL: emptyFrame:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: emptyFrame:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: bx lr
;
; THUMB-ENABLE-LABEL: emptyFrame:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: emptyFrame:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: bx lr
entry:
ret i32 0
}
; Check that we handle inline asm correctly.
; inlineAsm:
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; Prologue code.
; Make sure we save the CSR used in the inline asm: r4.
; push {r4, r7, lr}
; add r7, sp, #4
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; mov{{s?}} [[IV:r[0-9]+]], #10
;
; Next BB.
; [[LOOP:LBB[0-9_]+]]: @ %for.body
; subs [[IV]], [[IV]], #1
; subs [[IV]], #1
; add{{(\.w)?}} r4, r4, #1
; bne [[LOOP]]
;
; Next BB.
; mov{{s?}} r0, #0
;
; Duplicated epilogue.
; pop {r4, r7, pc}
;
; [[ELSE_LABEL]]: @ %if.else
; Shift second argument by one and store into returned register.
; lsl{{s?}} r0, r1, #1
; pop {r4, r7, pc}
;
; bx lr
define i32 @inlineAsm(i32 %cond, i32 %N) "frame-pointer"="all" {
; ARM-ENABLE-LABEL: inlineAsm:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: beq LBB6_4
; ARM-ENABLE-NEXT: @ %bb.1: @ %for.preheader
; ARM-ENABLE-NEXT: push {r4, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #4
; ARM-ENABLE-NEXT: mov r0, #10
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: LBB6_2: @ %for.body
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: subs r0, r0, #1
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: add r4, r4, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: bne LBB6_2
; ARM-ENABLE-NEXT: @ %bb.3: @ %for.exit
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: nop
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: pop {r4, r7, pc}
; ARM-ENABLE-NEXT: LBB6_4: @ %if.else
; ARM-ENABLE-NEXT: lsl r0, r1, #1
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: inlineAsm:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #4
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: beq LBB6_4
; ARM-DISABLE-NEXT: @ %bb.1: @ %for.preheader
; ARM-DISABLE-NEXT: mov r0, #10
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: LBB6_2: @ %for.body
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: subs r0, r0, #1
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: add r4, r4, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: bne LBB6_2
; ARM-DISABLE-NEXT: @ %bb.3: @ %for.exit
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: nop
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
; ARM-DISABLE-NEXT: LBB6_4: @ %if.else
; ARM-DISABLE-NEXT: lsl r0, r1, #1
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
;
; THUMB-ENABLE-LABEL: inlineAsm:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: cbz r0, LBB6_4
; THUMB-ENABLE-NEXT: @ %bb.1: @ %for.preheader
; THUMB-ENABLE-NEXT: push {r4, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #4
; THUMB-ENABLE-NEXT: movs r0, #10
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: LBB6_2: @ %for.body
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: subs r0, #1
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: add.w r4, r4, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: bne LBB6_2
; THUMB-ENABLE-NEXT: @ %bb.3: @ %for.exit
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: nop
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: pop {r4, r7, pc}
; THUMB-ENABLE-NEXT: LBB6_4: @ %if.else
; THUMB-ENABLE-NEXT: lsls r0, r1, #1
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: inlineAsm:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #4
; THUMB-DISABLE-NEXT: cbz r0, LBB6_4
; THUMB-DISABLE-NEXT: @ %bb.1: @ %for.preheader
; THUMB-DISABLE-NEXT: movs r0, #10
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: LBB6_2: @ %for.body
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: subs r0, #1
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: add.w r4, r4, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: bne LBB6_2
; THUMB-DISABLE-NEXT: @ %bb.3: @ %for.exit
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: nop
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
; THUMB-DISABLE-NEXT: LBB6_4: @ %if.else
; THUMB-DISABLE-NEXT: lsls r0, r1, #1
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %for.preheader
for.preheader:
tail call void asm "nop", ""()
br label %for.body
for.body: ; preds = %entry, %for.body
%i.03 = phi i32 [ %inc, %for.body ], [ 0, %for.preheader ]
tail call void asm sideeffect "add r4, #1", "~{r4}"()
%inc = add nuw nsw i32 %i.03, 1
%exitcond = icmp eq i32 %inc, 10
br i1 %exitcond, label %for.exit, label %for.body
for.exit:
tail call void asm "nop", ""()
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %for.body, %if.else
%sum.0 = phi i32 [ %mul, %if.else ], [ 0, %for.exit ]
ret i32 %sum.0
}
; Check that we handle calls to variadic functions correctly.
; callVariadicFunc:
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; Prologue code.
; push {r7, lr}
; mov r7, sp
; sub sp, {{(sp, )?}}#12
;
; cmp r0, #0
; beq [[ELSE_LABEL:LBB[0-9_]+]]
; cbz r0, [[ELSE_LABEL:LBB[0-9_]+]]
;
; Setup of the varags.
; mov r0, r1
; mov r2, r1
; mov r3, r1
; str r1, [sp]
; str r1, [sp, #4]
; strd r1, r1, [sp]
; str r1, [sp, #8]
; bl{{x?}} _someVariadicFunc
; lsl{{s?}} r0, r0, #3
; mov sp, r7
; add sp, #12
; pop {r7, pc}
;
; [[ELSE_LABEL]]: @ %if.else
; Shift second argument by one and store into returned register.
; lsl{{s?}} r0, r1, #1
;
; Epilogue code.
; bx lr
;
; mov sp, r7
; add sp, #12
; pop {r7, pc}
define i32 @callVariadicFunc(i32 %cond, i32 %N) "frame-pointer"="all" {
; ARM-ENABLE-LABEL: callVariadicFunc:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: beq LBB7_2
; ARM-ENABLE-NEXT: @ %bb.1: @ %if.then
; ARM-ENABLE-NEXT: push {r7, lr}
; ARM-ENABLE-NEXT: mov r7, sp
; ARM-ENABLE-NEXT: sub sp, sp, #12
; ARM-ENABLE-NEXT: mov r0, r1
; ARM-ENABLE-NEXT: mov r2, r1
; ARM-ENABLE-NEXT: mov r3, r1
; ARM-ENABLE-NEXT: str r1, [sp]
; ARM-ENABLE-NEXT: str r1, [sp, #4]
; ARM-ENABLE-NEXT: str r1, [sp, #8]
; ARM-ENABLE-NEXT: bl _someVariadicFunc
; ARM-ENABLE-NEXT: lsl r0, r0, #3
; ARM-ENABLE-NEXT: mov sp, r7
; ARM-ENABLE-NEXT: pop {r7, pc}
; ARM-ENABLE-NEXT: LBB7_2: @ %if.else
; ARM-ENABLE-NEXT: lsl r0, r1, #1
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: callVariadicFunc:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r7, lr}
; ARM-DISABLE-NEXT: mov r7, sp
; ARM-DISABLE-NEXT: sub sp, sp, #12
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: beq LBB7_2
; ARM-DISABLE-NEXT: @ %bb.1: @ %if.then
; ARM-DISABLE-NEXT: mov r0, r1
; ARM-DISABLE-NEXT: mov r2, r1
; ARM-DISABLE-NEXT: mov r3, r1
; ARM-DISABLE-NEXT: str r1, [sp]
; ARM-DISABLE-NEXT: str r1, [sp, #4]
; ARM-DISABLE-NEXT: str r1, [sp, #8]
; ARM-DISABLE-NEXT: bl _someVariadicFunc
; ARM-DISABLE-NEXT: lsl r0, r0, #3
; ARM-DISABLE-NEXT: mov sp, r7
; ARM-DISABLE-NEXT: pop {r7, pc}
; ARM-DISABLE-NEXT: LBB7_2: @ %if.else
; ARM-DISABLE-NEXT: lsl r0, r1, #1
; ARM-DISABLE-NEXT: mov sp, r7
; ARM-DISABLE-NEXT: pop {r7, pc}
;
; THUMB-ENABLE-LABEL: callVariadicFunc:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: cbz r0, LBB7_2
; THUMB-ENABLE-NEXT: @ %bb.1: @ %if.then
; THUMB-ENABLE-NEXT: push {r7, lr}
; THUMB-ENABLE-NEXT: mov r7, sp
; THUMB-ENABLE-NEXT: sub sp, #12
; THUMB-ENABLE-NEXT: mov r0, r1
; THUMB-ENABLE-NEXT: mov r2, r1
; THUMB-ENABLE-NEXT: mov r3, r1
; THUMB-ENABLE-NEXT: strd r1, r1, [sp]
; THUMB-ENABLE-NEXT: str r1, [sp, #8]
; THUMB-ENABLE-NEXT: bl _someVariadicFunc
; THUMB-ENABLE-NEXT: lsls r0, r0, #3
; THUMB-ENABLE-NEXT: add sp, #12
; THUMB-ENABLE-NEXT: pop {r7, pc}
; THUMB-ENABLE-NEXT: LBB7_2: @ %if.else
; THUMB-ENABLE-NEXT: lsls r0, r1, #1
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: callVariadicFunc:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r7, lr}
; THUMB-DISABLE-NEXT: mov r7, sp
; THUMB-DISABLE-NEXT: sub sp, #12
; THUMB-DISABLE-NEXT: cbz r0, LBB7_2
; THUMB-DISABLE-NEXT: @ %bb.1: @ %if.then
; THUMB-DISABLE-NEXT: mov r0, r1
; THUMB-DISABLE-NEXT: mov r2, r1
; THUMB-DISABLE-NEXT: mov r3, r1
; THUMB-DISABLE-NEXT: strd r1, r1, [sp]
; THUMB-DISABLE-NEXT: str r1, [sp, #8]
; THUMB-DISABLE-NEXT: bl _someVariadicFunc
; THUMB-DISABLE-NEXT: lsls r0, r0, #3
; THUMB-DISABLE-NEXT: add sp, #12
; THUMB-DISABLE-NEXT: pop {r7, pc}
; THUMB-DISABLE-NEXT: LBB7_2: @ %if.else
; THUMB-DISABLE-NEXT: lsls r0, r1, #1
; THUMB-DISABLE-NEXT: add sp, #12
; THUMB-DISABLE-NEXT: pop {r7, pc}
entry:
%tobool = icmp eq i32 %cond, 0
br i1 %tobool, label %if.else, label %if.then
if.then: ; preds = %entry
%call = tail call i32 (i32, ...) @someVariadicFunc(i32 %N, i32 %N, i32 %N, i32 %N, i32 %N, i32 %N, i32 %N)
%shl = shl i32 %call, 3
br label %if.end
if.else: ; preds = %entry
%mul = shl nsw i32 %N, 1
br label %if.end
if.end: ; preds = %if.else, %if.then
%sum.0 = phi i32 [ %shl, %if.then ], [ %mul, %if.else ]
ret i32 %sum.0
}
declare i32 @someVariadicFunc(i32, ...)
; Make sure we do not insert unreachable code after noreturn function.
; Although this is not incorrect to insert such code, it is useless
; and it hurts the binary size.
;
; noreturn:
; push
; cmp r0, #0
; cmp r0, #0
; bne [[ABORT:LBB[0-9_]+]]
; bne [[ABORT:LBB[0-9_]+]]
; cbnz r0, [[ABORT:LBB[0-9_]+]]
; cbnz r0, [[ABORT:LBB[0-9_]+]]
;
; mov{{s?}} r0, #42
;
; bx lr
;
; pop
;;
; [[ABORT]]: @ %if.abort
;
; push
;
; bl{{x?}} _abort
; pop
define i32 @noreturn(i8 signext %bad_thing) "frame-pointer"="all" {
; ARM-ENABLE-LABEL: noreturn:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: bne LBB8_2
; ARM-ENABLE-NEXT: @ %bb.1: @ %if.end
; ARM-ENABLE-NEXT: mov r0, #42
; ARM-ENABLE-NEXT: bx lr
; ARM-ENABLE-NEXT: LBB8_2: @ %if.abort
; ARM-ENABLE-NEXT: push {r4, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #4
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: mov r0, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: bl _abort
;
; ARM-DISABLE-LABEL: noreturn:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #4
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: bne LBB8_2
; ARM-DISABLE-NEXT: @ %bb.1: @ %if.end
; ARM-DISABLE-NEXT: mov r0, #42
; ARM-DISABLE-NEXT: pop {r4, r7, pc}
; ARM-DISABLE-NEXT: LBB8_2: @ %if.abort
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: mov r0, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: bl _abort
;
; THUMB-ENABLE-LABEL: noreturn:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: cbnz r0, LBB8_2
; THUMB-ENABLE-NEXT: @ %bb.1: @ %if.end
; THUMB-ENABLE-NEXT: movs r0, #42
; THUMB-ENABLE-NEXT: bx lr
; THUMB-ENABLE-NEXT: LBB8_2: @ %if.abort
; THUMB-ENABLE-NEXT: push {r4, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #4
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: mov.w r0, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: bl _abort
;
; THUMB-DISABLE-LABEL: noreturn:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #4
; THUMB-DISABLE-NEXT: cbnz r0, LBB8_2
; THUMB-DISABLE-NEXT: @ %bb.1: @ %if.end
; THUMB-DISABLE-NEXT: movs r0, #42
; THUMB-DISABLE-NEXT: pop {r4, r7, pc}
; THUMB-DISABLE-NEXT: LBB8_2: @ %if.abort
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: mov.w r0, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: bl _abort
entry:
%tobool = icmp eq i8 %bad_thing, 0
br i1 %tobool, label %if.end, label %if.abort
if.abort:
%call = tail call i32 asm sideeffect "mov $0, #1", "=r,~{r4}"()
tail call void @abort() #0
unreachable
if.end:
ret i32 42
}
declare void @abort() #0
attributes #0 = { noreturn nounwind }
; Make sure that we handle infinite loops properly When checking that the Save
; and Restore blocks are control flow equivalent, the loop searches for the
; immediate (post) dominator for the (restore) save blocks. When either the Save
; or Restore block is located in an infinite loop the only immediate (post)
; dominator is itself. In this case, we cannot perform shrink wrapping, but we
; should return gracefully and continue compilation.
; The only condition for this test is the compilation finishes correctly.
; infiniteloop
; pop
define void @infiniteloop() "frame-pointer"="all" {
; ARM-LABEL: infiniteloop:
; ARM: @ %bb.0: @ %entry
; ARM-NEXT: push {r4, r5, r7, lr}
; ARM-NEXT: add r7, sp, #8
; ARM-NEXT: mov r0, #0
; ARM-NEXT: cmp r0, #0
; ARM-NEXT: bne LBB9_3
; ARM-NEXT: @ %bb.1: @ %if.then
; ARM-NEXT: sub r1, sp, #16
; ARM-NEXT: mov sp, r1
; ARM-NEXT: LBB9_2: @ %for.body
; ARM-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-NEXT: @ InlineAsm Start
; ARM-NEXT: mov r2, #1
; ARM-NEXT: @ InlineAsm End
; ARM-NEXT: add r0, r2, r0
; ARM-NEXT: str r0, [r1]
; ARM-NEXT: b LBB9_2
; ARM-NEXT: LBB9_3: @ %if.end
; ARM-NEXT: sub sp, r7, #8
; ARM-NEXT: pop {r4, r5, r7, pc}
;
; THUMB-LABEL: infiniteloop:
; THUMB: @ %bb.0: @ %entry
; THUMB-NEXT: push {r4, r5, r7, lr}
; THUMB-NEXT: add r7, sp, #8
; THUMB-NEXT: movs r0, #0
; THUMB-NEXT: cbnz r0, LBB9_3
; THUMB-NEXT: @ %bb.1: @ %if.then
; THUMB-NEXT: sub.w r0, sp, #16
; THUMB-NEXT: mov sp, r0
; THUMB-NEXT: movs r1, #0
; THUMB-NEXT: LBB9_2: @ %for.body
; THUMB-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-NEXT: @ InlineAsm Start
; THUMB-NEXT: mov.w r2, #1
; THUMB-NEXT: @ InlineAsm End
; THUMB-NEXT: add r1, r2
; THUMB-NEXT: str r1, [r0]
; THUMB-NEXT: b LBB9_2
; THUMB-NEXT: LBB9_3: @ %if.end
; THUMB-NEXT: sub.w r4, r7, #8
; THUMB-NEXT: mov sp, r4
; THUMB-NEXT: pop {r4, r5, r7, pc}
; ARM-ENABLE-LABEL: infiniteloop:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: push {r4, r5, r7, lr}
; ARM-ENABLE-NEXT: add r7, sp, #8
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: bne LBB9_3
; ARM-ENABLE-NEXT: @ %bb.1: @ %if.then
; ARM-ENABLE-NEXT: sub r1, sp, #16
; ARM-ENABLE-NEXT: mov sp, r1
; ARM-ENABLE-NEXT: LBB9_2: @ %for.body
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: @ InlineAsm Start
; ARM-ENABLE-NEXT: mov r2, #1
; ARM-ENABLE-NEXT: @ InlineAsm End
; ARM-ENABLE-NEXT: add r0, r2, r0
; ARM-ENABLE-NEXT: str r0, [r1]
; ARM-ENABLE-NEXT: b LBB9_2
; ARM-ENABLE-NEXT: LBB9_3: @ %if.end
; ARM-ENABLE-NEXT: sub sp, r7, #8
; ARM-ENABLE-NEXT: pop {r4, r5, r7, pc}
;
; ARM-DISABLE-LABEL: infiniteloop:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: push {r4, r5, r7, lr}
; ARM-DISABLE-NEXT: add r7, sp, #8
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: bne LBB9_3
; ARM-DISABLE-NEXT: @ %bb.1: @ %if.then
; ARM-DISABLE-NEXT: sub r1, sp, #16
; ARM-DISABLE-NEXT: mov sp, r1
; ARM-DISABLE-NEXT: LBB9_2: @ %for.body
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: @ InlineAsm Start
; ARM-DISABLE-NEXT: mov r2, #1
; ARM-DISABLE-NEXT: @ InlineAsm End
; ARM-DISABLE-NEXT: add r0, r2, r0
; ARM-DISABLE-NEXT: str r0, [r1]
; ARM-DISABLE-NEXT: b LBB9_2
; ARM-DISABLE-NEXT: LBB9_3: @ %if.end
; ARM-DISABLE-NEXT: sub sp, r7, #8
; ARM-DISABLE-NEXT: pop {r4, r5, r7, pc}
;
; THUMB-ENABLE-LABEL: infiniteloop:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: push {r4, r5, r7, lr}
; THUMB-ENABLE-NEXT: add r7, sp, #8
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: cbnz r0, LBB9_3
; THUMB-ENABLE-NEXT: @ %bb.1: @ %if.then
; THUMB-ENABLE-NEXT: sub.w r0, sp, #16
; THUMB-ENABLE-NEXT: mov sp, r0
; THUMB-ENABLE-NEXT: movs r1, #0
; THUMB-ENABLE-NEXT: LBB9_2: @ %for.body
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: @ InlineAsm Start
; THUMB-ENABLE-NEXT: mov.w r2, #1
; THUMB-ENABLE-NEXT: @ InlineAsm End
; THUMB-ENABLE-NEXT: add r1, r2
; THUMB-ENABLE-NEXT: str r1, [r0]
; THUMB-ENABLE-NEXT: b LBB9_2
; THUMB-ENABLE-NEXT: LBB9_3: @ %if.end
; THUMB-ENABLE-NEXT: sub.w r4, r7, #8
; THUMB-ENABLE-NEXT: mov sp, r4
; THUMB-ENABLE-NEXT: pop {r4, r5, r7, pc}
;
; THUMB-DISABLE-LABEL: infiniteloop:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: push {r4, r5, r7, lr}
; THUMB-DISABLE-NEXT: add r7, sp, #8
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: cbnz r0, LBB9_3
; THUMB-DISABLE-NEXT: @ %bb.1: @ %if.then
; THUMB-DISABLE-NEXT: sub.w r0, sp, #16
; THUMB-DISABLE-NEXT: mov sp, r0
; THUMB-DISABLE-NEXT: movs r1, #0
; THUMB-DISABLE-NEXT: LBB9_2: @ %for.body
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: @ InlineAsm Start
; THUMB-DISABLE-NEXT: mov.w r2, #1
; THUMB-DISABLE-NEXT: @ InlineAsm End
; THUMB-DISABLE-NEXT: add r1, r2
; THUMB-DISABLE-NEXT: str r1, [r0]
; THUMB-DISABLE-NEXT: b LBB9_2
; THUMB-DISABLE-NEXT: LBB9_3: @ %if.end
; THUMB-DISABLE-NEXT: sub.w r4, r7, #8
; THUMB-DISABLE-NEXT: mov sp, r4
; THUMB-DISABLE-NEXT: pop {r4, r5, r7, pc}
entry:
br i1 undef, label %if.then, label %if.end
if.then:
%ptr = alloca i32, i32 4
br label %for.body
for.body: ; preds = %for.body, %entry
%sum.03 = phi i32 [ 0, %if.then ], [ %add, %for.body ]
%call = tail call i32 asm sideeffect "mov $0, #1", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.03
store i32 %add, i32* %ptr
br label %for.body
if.end:
ret void
}
; Another infinite loop test this time with a body bigger than just one block.
; infiniteloop2
; pop
define void @infiniteloop2() "frame-pointer"="all" {
entry:
br i1 undef, label %if.then, label %if.end
if.then:
%ptr = alloca i32, i32 4
br label %for.body
for.body: ; preds = %for.body, %entry
%sum.03 = phi i32 [ 0, %if.then ], [ %add, %body1 ], [ 1, %body2]
%call = tail call i32 asm "mov $0, #0", "=r,~{r4}"()
%add = add nsw i32 %call, %sum.03
store i32 %add, i32* %ptr
br i1 undef, label %body1, label %body2
body1:
tail call void asm sideeffect "nop", "~{r4}"()
br label %for.body
body2:
tail call void asm sideeffect "nop", "~{r4}"()
br label %for.body
if.end:
ret void
}
; Another infinite loop test this time with two nested infinite loop.
; infiniteloop3
; bx lr
define void @infiniteloop3() "frame-pointer"="all" {
; ARM-LABEL: infiniteloop3:
; ARM: @ %bb.0: @ %entry
; ARM-NEXT: mov r0, #0
; ARM-NEXT: cmp r0, #0
; ARM-NEXT: bne LBB11_5
; ARM-NEXT: @ %bb.1: @ %loop2a.preheader
; ARM-NEXT: mov r1, #0
; ARM-NEXT: mov r2, r0
; ARM-NEXT: b LBB11_3
; ARM-NEXT: LBB11_2: @ %loop2b
; ARM-NEXT: @ in Loop: Header=BB11_3 Depth=1
; ARM-NEXT: str r1, [r2]
; ARM-NEXT: mov r2, r1
; ARM-NEXT: mov r1, r3
; ARM-NEXT: LBB11_3: @ %loop1
; ARM-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-NEXT: ldr r3, [r0]
; ARM-NEXT: cmp r0, #0
; ARM-NEXT: bne LBB11_2
; ARM-NEXT: @ %bb.4: @ in Loop: Header=BB11_3 Depth=1
; ARM-NEXT: mov r0, r1
; ARM-NEXT: mov r1, r3
; ARM-NEXT: mov r2, r0
; ARM-NEXT: b LBB11_3
; ARM-NEXT: LBB11_5: @ %end
; ARM-NEXT: bx lr
;
; THUMB-LABEL: infiniteloop3:
; THUMB: @ %bb.0: @ %entry
; THUMB-NEXT: movs r0, #0
; THUMB-NEXT: cbnz r0, LBB11_5
; THUMB-NEXT: @ %bb.1: @ %loop2a.preheader
; THUMB-NEXT: movs r0, #0
; THUMB-NEXT: movs r1, #0
; THUMB-NEXT: mov r2, r0
; THUMB-NEXT: b LBB11_3
; THUMB-NEXT: LBB11_2: @ %loop2b
; THUMB-NEXT: @ in Loop: Header=BB11_3 Depth=1
; THUMB-NEXT: str r1, [r2]
; THUMB-NEXT: mov r2, r1
; THUMB-NEXT: mov r1, r3
; THUMB-NEXT: LBB11_3: @ %loop1
; THUMB-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-NEXT: ldr r3, [r0]
; THUMB-NEXT: cmp r0, #0
; THUMB-NEXT: bne LBB11_2
; THUMB-NEXT: @ %bb.4: @ in Loop: Header=BB11_3 Depth=1
; THUMB-NEXT: mov r0, r1
; THUMB-NEXT: mov r1, r3
; THUMB-NEXT: mov r2, r0
; THUMB-NEXT: b LBB11_3
; THUMB-NEXT: LBB11_5: @ %end
; THUMB-NEXT: bx lr
; ARM-ENABLE-LABEL: infiniteloop3:
; ARM-ENABLE: @ %bb.0: @ %entry
; ARM-ENABLE-NEXT: mov r0, #0
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: bne LBB11_5
; ARM-ENABLE-NEXT: @ %bb.1: @ %loop2a.preheader
; ARM-ENABLE-NEXT: mov r1, #0
; ARM-ENABLE-NEXT: mov r2, r0
; ARM-ENABLE-NEXT: b LBB11_3
; ARM-ENABLE-NEXT: LBB11_2: @ %loop2b
; ARM-ENABLE-NEXT: @ in Loop: Header=BB11_3 Depth=1
; ARM-ENABLE-NEXT: str r1, [r2]
; ARM-ENABLE-NEXT: mov r2, r1
; ARM-ENABLE-NEXT: mov r1, r3
; ARM-ENABLE-NEXT: LBB11_3: @ %loop1
; ARM-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-ENABLE-NEXT: ldr r3, [r0]
; ARM-ENABLE-NEXT: cmp r0, #0
; ARM-ENABLE-NEXT: bne LBB11_2
; ARM-ENABLE-NEXT: @ %bb.4: @ in Loop: Header=BB11_3 Depth=1
; ARM-ENABLE-NEXT: mov r0, r1
; ARM-ENABLE-NEXT: mov r1, r3
; ARM-ENABLE-NEXT: mov r2, r0
; ARM-ENABLE-NEXT: b LBB11_3
; ARM-ENABLE-NEXT: LBB11_5: @ %end
; ARM-ENABLE-NEXT: bx lr
;
; ARM-DISABLE-LABEL: infiniteloop3:
; ARM-DISABLE: @ %bb.0: @ %entry
; ARM-DISABLE-NEXT: mov r0, #0
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: bne LBB11_5
; ARM-DISABLE-NEXT: @ %bb.1: @ %loop2a.preheader
; ARM-DISABLE-NEXT: mov r1, #0
; ARM-DISABLE-NEXT: mov r2, r0
; ARM-DISABLE-NEXT: b LBB11_3
; ARM-DISABLE-NEXT: LBB11_2: @ %loop2b
; ARM-DISABLE-NEXT: @ in Loop: Header=BB11_3 Depth=1
; ARM-DISABLE-NEXT: str r1, [r2]
; ARM-DISABLE-NEXT: mov r2, r1
; ARM-DISABLE-NEXT: mov r1, r3
; ARM-DISABLE-NEXT: LBB11_3: @ %loop1
; ARM-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; ARM-DISABLE-NEXT: ldr r3, [r0]
; ARM-DISABLE-NEXT: cmp r0, #0
; ARM-DISABLE-NEXT: bne LBB11_2
; ARM-DISABLE-NEXT: @ %bb.4: @ in Loop: Header=BB11_3 Depth=1
; ARM-DISABLE-NEXT: mov r0, r1
; ARM-DISABLE-NEXT: mov r1, r3
; ARM-DISABLE-NEXT: mov r2, r0
; ARM-DISABLE-NEXT: b LBB11_3
; ARM-DISABLE-NEXT: LBB11_5: @ %end
; ARM-DISABLE-NEXT: bx lr
;
; THUMB-ENABLE-LABEL: infiniteloop3:
; THUMB-ENABLE: @ %bb.0: @ %entry
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: cbnz r0, LBB11_5
; THUMB-ENABLE-NEXT: @ %bb.1: @ %loop2a.preheader
; THUMB-ENABLE-NEXT: movs r0, #0
; THUMB-ENABLE-NEXT: movs r1, #0
; THUMB-ENABLE-NEXT: mov r2, r0
; THUMB-ENABLE-NEXT: b LBB11_3
; THUMB-ENABLE-NEXT: LBB11_2: @ %loop2b
; THUMB-ENABLE-NEXT: @ in Loop: Header=BB11_3 Depth=1
; THUMB-ENABLE-NEXT: str r1, [r2]
; THUMB-ENABLE-NEXT: mov r2, r1
; THUMB-ENABLE-NEXT: mov r1, r3
; THUMB-ENABLE-NEXT: LBB11_3: @ %loop1
; THUMB-ENABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-ENABLE-NEXT: ldr r3, [r0]
; THUMB-ENABLE-NEXT: cmp r0, #0
; THUMB-ENABLE-NEXT: bne LBB11_2
; THUMB-ENABLE-NEXT: @ %bb.4: @ in Loop: Header=BB11_3 Depth=1
; THUMB-ENABLE-NEXT: mov r0, r1
; THUMB-ENABLE-NEXT: mov r1, r3
; THUMB-ENABLE-NEXT: mov r2, r0
; THUMB-ENABLE-NEXT: b LBB11_3
; THUMB-ENABLE-NEXT: LBB11_5: @ %end
; THUMB-ENABLE-NEXT: bx lr
;
; THUMB-DISABLE-LABEL: infiniteloop3:
; THUMB-DISABLE: @ %bb.0: @ %entry
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: cbnz r0, LBB11_5
; THUMB-DISABLE-NEXT: @ %bb.1: @ %loop2a.preheader
; THUMB-DISABLE-NEXT: movs r0, #0
; THUMB-DISABLE-NEXT: movs r1, #0
; THUMB-DISABLE-NEXT: mov r2, r0
; THUMB-DISABLE-NEXT: b LBB11_3
; THUMB-DISABLE-NEXT: LBB11_2: @ %loop2b
; THUMB-DISABLE-NEXT: @ in Loop: Header=BB11_3 Depth=1
; THUMB-DISABLE-NEXT: str r1, [r2]
; THUMB-DISABLE-NEXT: mov r2, r1
; THUMB-DISABLE-NEXT: mov r1, r3
; THUMB-DISABLE-NEXT: LBB11_3: @ %loop1
; THUMB-DISABLE-NEXT: @ =>This Inner Loop Header: Depth=1
; THUMB-DISABLE-NEXT: ldr r3, [r0]
; THUMB-DISABLE-NEXT: cmp r0, #0
; THUMB-DISABLE-NEXT: bne LBB11_2
; THUMB-DISABLE-NEXT: @ %bb.4: @ in Loop: Header=BB11_3 Depth=1
; THUMB-DISABLE-NEXT: mov r0, r1
; THUMB-DISABLE-NEXT: mov r1, r3
; THUMB-DISABLE-NEXT: mov r2, r0
; THUMB-DISABLE-NEXT: b LBB11_3
; THUMB-DISABLE-NEXT: LBB11_5: @ %end
; THUMB-DISABLE-NEXT: bx lr
entry:
br i1 undef, label %loop2a, label %body
body: ; preds = %entry
br i1 undef, label %loop2a, label %end
loop1: ; preds = %loop2a, %loop2b
%var.phi = phi i32* [ %next.phi, %loop2b ], [ %var, %loop2a ]
%next.phi = phi i32* [ %next.load, %loop2b ], [ %next.var, %loop2a ]
%0 = icmp eq i32* %var, null
%next.load = load i32*, i32** undef
br i1 %0, label %loop2a, label %loop2b
loop2a: ; preds = %loop1, %body, %entry
%var = phi i32* [ null, %body ], [ null, %entry ], [ %next.phi, %loop1 ]
%next.var = phi i32* [ undef, %body ], [ null, %entry ], [ %next.load, %loop1 ]
br label %loop1
loop2b: ; preds = %loop1
%gep1 = bitcast i32* %var.phi to i32*
%next.ptr = bitcast i32* %gep1 to i32**
store i32* %next.phi, i32** %next.ptr
br label %loop1
end:
ret void
}
; Function Attrs: nounwind readnone
declare double @llvm.pow.f64(double, double)
; This function needs to spill floating point registers to
; exercise the path where we were dereferencing the end iterator
; to access debug info location while inserting the spill code
; during PEI with shrink-wrapping enable.
; debug_info:
;
; {{tst r2, #1|lsls r1, r2, #31}}
; beq [[BB13:LBB[0-9_]+]]
;
; push
;
; {{tst r2, #1|lsls r1, r2, #31}}
; beq [[BB13:LBB[0-9_]+]]
;
; bl{{x?}} _pow
;
;
; pop
;
; [[BB13]]:
; vldr
;
; pop
;
; FIXME: This is flakey passing by finding 'bl' somewhere amongst the debug
; info (like labels named 'line_table) not because it's found a bl instruction.
;
; bl
define float @debug_info(float %gamma, float %slopeLimit, i1 %or.cond, double %tmp) "frame-pointer"="all" {
; ARM-LABEL: debug_info:
; ARM: @ %bb.0: @ %bb
; ARM-NEXT: push {r4, r7, lr}
; ARM-NEXT: add r7, sp, #4
; ARM-NEXT: sub r4, sp, #16
; ARM-NEXT: bfc r4, #0, #4
; ARM-NEXT: mov sp, r4
; ARM-NEXT: tst r2, #1
; ARM-NEXT: vst1.64 {d8, d9}, [r4:128]
; ARM-NEXT: beq LBB12_2
; ARM-NEXT: @ %bb.1: @ %bb3
; ARM-NEXT: ldr r1, [r7, #8]
; ARM-NEXT: vmov s16, r0
; ARM-NEXT: mov r0, r3
; ARM-NEXT: mov r2, r3
; ARM-NEXT: vmov d9, r3, r1
; ARM-NEXT: mov r3, r1
; ARM-NEXT: bl _pow
; ARM-NEXT: vmov.f32 s0, #1.000000e+00
; ARM-NEXT: vmov.f64 d16, #1.000000e+00
; ARM-NEXT: vadd.f64 d16, d9, d16
; ARM-NEXT: vcmp.f32 s16, s0
; ARM-NEXT: vmrs APSR_nzcv, fpscr
; ARM-NEXT: vmov d17, r0, r1
; ARM-NEXT: vmov.f64 d18, d9
; ARM-NEXT: vadd.f64 d17, d17, d17
; ARM-NEXT: vmovgt.f64 d18, d16
; ARM-NEXT: vcmp.f64 d18, d9
; ARM-NEXT: vmrs APSR_nzcv, fpscr
; ARM-NEXT: vmovne.f64 d9, d17
; ARM-NEXT: vcvt.f32.f64 s0, d9
; ARM-NEXT: b LBB12_3
; ARM-NEXT: LBB12_2:
; ARM-NEXT: vldr s0, LCPI12_0
; ARM-NEXT: LBB12_3: @ %bb13
; ARM-NEXT: mov r4, sp
; ARM-NEXT: vld1.64 {d8, d9}, [r4:128]
; ARM-NEXT: vmov r0, s0
; ARM-NEXT: sub sp, r7, #4
; ARM-NEXT: pop {r4, r7, pc}
; ARM-NEXT: .p2align 2
; ARM-NEXT: @ %bb.4:
; ARM-NEXT: .data_region
; ARM-NEXT: LCPI12_0:
; ARM-NEXT: .long 0 @ float 0
; ARM-NEXT: .end_data_region
;
; THUMB-LABEL: debug_info:
; THUMB: @ %bb.0: @ %bb
; THUMB-NEXT: push {r4, r7, lr}
; THUMB-NEXT: add r7, sp, #4
; THUMB-NEXT: sub.w r4, sp, #16
; THUMB-NEXT: bfc r4, #0, #4
; THUMB-NEXT: mov sp, r4
; THUMB-NEXT: lsls r1, r2, #31
; THUMB-NEXT: vst1.64 {d8, d9}, [r4:128]
; THUMB-NEXT: beq LBB12_2
; THUMB-NEXT: @ %bb.1: @ %bb3
; THUMB-NEXT: ldr r1, [r7, #8]
; THUMB-NEXT: vmov s16, r0
; THUMB-NEXT: mov r0, r3
; THUMB-NEXT: mov r2, r3
; THUMB-NEXT: vmov d9, r3, r1
; THUMB-NEXT: mov r3, r1
; THUMB-NEXT: bl _pow
; THUMB-NEXT: vmov.f32 s0, #1.000000e+00
; THUMB-NEXT: vmov.f64 d16, #1.000000e+00
; THUMB-NEXT: vmov.f64 d18, d9
; THUMB-NEXT: vcmp.f32 s16, s0
; THUMB-NEXT: vadd.f64 d16, d9, d16
; THUMB-NEXT: vmrs APSR_nzcv, fpscr
; THUMB-NEXT: it gt
; THUMB-NEXT: vmovgt.f64 d18, d16
; THUMB-NEXT: vcmp.f64 d18, d9
; THUMB-NEXT: vmov d17, r0, r1
; THUMB-NEXT: vmrs APSR_nzcv, fpscr
; THUMB-NEXT: vadd.f64 d17, d17, d17
; THUMB-NEXT: it ne
; THUMB-NEXT: vmovne.f64 d9, d17
; THUMB-NEXT: vcvt.f32.f64 s0, d9
; THUMB-NEXT: b LBB12_3
; THUMB-NEXT: LBB12_2:
; THUMB-NEXT: vldr s0, LCPI12_0
; THUMB-NEXT: LBB12_3: @ %bb13
; THUMB-NEXT: mov r4, sp
; THUMB-NEXT: vld1.64 {d8, d9}, [r4:128]
; THUMB-NEXT: subs r4, r7, #4
; THUMB-NEXT: vmov r0, s0
; THUMB-NEXT: mov sp, r4
; THUMB-NEXT: pop {r4, r7, pc}
; THUMB-NEXT: .p2align 2
; THUMB-NEXT: @ %bb.4:
; THUMB-NEXT: .data_region
; THUMB-NEXT: LCPI12_0:
; THUMB-NEXT: .long 0 @ float 0
; THUMB-NEXT: .end_data_region
bb:
br i1 %or.cond, label %bb3, label %bb13
bb3: ; preds = %bb
%tmp4 = fcmp ogt float %gamma, 1.000000e+00
%tmp5 = fadd double 1.000000e+00, %tmp
%tmp6 = select i1 %tmp4, double %tmp5, double %tmp
%tmp10 = tail call double @llvm.pow.f64(double %tmp, double %tmp)
%tmp11 = fcmp une double %tmp6, %tmp
%tmp12 = fadd double %tmp10, %tmp10
%cutoff.0 = select i1 %tmp11, double %tmp12, double %tmp
%phitmp = fptrunc double %cutoff.0 to float
br label %bb13
bb13: ; preds = %bb3, %bb
%cutoff.1 = phi float [ 0.000000e+00, %bb ], [ %phitmp, %bb3 ]
ret float %cutoff.1
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "LLVM", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !4, globals: !2, imports: !2)
!1 = !DIFile(filename: "a.cpp", directory: "b")
!2 = !{}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{!5}
!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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