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llvm-project/llvm/test/Transforms/LoopUnroll/full-unroll-keep-first-exit.ll

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LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -loop-unroll < %s | FileCheck %s
; RUN: opt -S -passes='require<opt-remark-emit>,loop(loop-unroll-full)' < %s | FileCheck %s
; Unroll twice, with first loop exit kept
define void @s32_max1(i32 %n, i32* %p) {
;
; CHECK-LABEL: @s32_max1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[N:%.*]], 1
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[N]]
; CHECK-NEXT: store i32 [[N]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC:%.*]] = add i32 [[N]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[N]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY_1:%.*]], label [[DO_END:%.*]]
; CHECK: do.body.1:
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr i32, i32* [[P]], i32 [[INC]]
; CHECK-NEXT: store i32 [[INC]], i32* [[ARRAYIDX_1]], align 4
; CHECK-NEXT: br label [[DO_END]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %n, 1
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %do.body ]
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp = icmp slt i32 %i.0, %add
br i1 %cmp, label %do.body, label %do.end ; taken either 0 or 1 times
do.end:
ret void
}
; Unroll thrice, with first loop exit kept
define void @s32_max2(i32 %n, i32* %p) {
;
; CHECK-LABEL: @s32_max2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[N:%.*]], 2
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[N]]
; CHECK-NEXT: store i32 [[N]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC:%.*]] = add i32 [[N]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[N]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY_1:%.*]], label [[DO_END:%.*]]
; CHECK: do.body.1:
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr i32, i32* [[P]], i32 [[INC]]
; CHECK-NEXT: store i32 [[INC]], i32* [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[INC_1:%.*]] = add i32 [[INC]], 1
; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr i32, i32* [[P]], i32 [[INC_1]]
; CHECK-NEXT: store i32 [[INC_1]], i32* [[ARRAYIDX_2]], align 4
; CHECK-NEXT: br label [[DO_END]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %n, 2
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %do.body ]
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp = icmp slt i32 %i.0, %add
br i1 %cmp, label %do.body, label %do.end ; taken either 0 or 2 times
do.end:
ret void
}
; Should not be unrolled
define void @s32_maxx(i32 %n, i32 %x, i32* %p) {
;
; CHECK-LABEL: @s32_maxx(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X:%.*]], [[N:%.*]]
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ [[N]], [[ENTRY:%.*]] ], [ [[INC:%.*]], [[DO_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[I_0]]
; CHECK-NEXT: store i32 [[I_0]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add i32 [[I_0]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I_0]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %x, %n
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %do.body ]
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp = icmp slt i32 %i.0, %add
br i1 %cmp, label %do.body, label %do.end ; taken either 0 or x times
do.end:
ret void
}
; Should not be unrolled
define void @s32_max2_unpredictable_exit(i32 %n, i32 %x, i32* %p) {
;
; CHECK-LABEL: @s32_max2_unpredictable_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[N:%.*]], 2
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ [[N]], [[ENTRY:%.*]] ], [ [[INC:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[I_0]], [[X:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_END:%.*]], label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[I_0]]
; CHECK-NEXT: store i32 [[I_0]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add i32 [[I_0]], 1
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[I_0]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP1]], label [[DO_BODY]], label [[DO_END]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %n, 2
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %if.end ]
%cmp = icmp eq i32 %i.0, %x
br i1 %cmp, label %do.end, label %if.end ; unpredictable
if.end:
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp1 = icmp slt i32 %i.0, %add
br i1 %cmp1, label %do.body, label %do.end ; taken either 0 or 2 times
do.end:
ret void
}
; Unroll twice, with first loop exit kept
define void @u32_max1(i32 %n, i32* %p) {
;
; CHECK-LABEL: @u32_max1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[N:%.*]], 1
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[N]]
; CHECK-NEXT: store i32 [[N]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC:%.*]] = add i32 [[N]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[N]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY_1:%.*]], label [[DO_END:%.*]]
; CHECK: do.body.1:
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr i32, i32* [[P]], i32 [[INC]]
; CHECK-NEXT: store i32 [[INC]], i32* [[ARRAYIDX_1]], align 4
; CHECK-NEXT: br label [[DO_END]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %n, 1
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %do.body ]
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp = icmp ult i32 %i.0, %add
br i1 %cmp, label %do.body, label %do.end ; taken either 0 or 1 times
do.end:
ret void
}
; Unroll thrice, with first loop exit kept
define void @u32_max2(i32 %n, i32* %p) {
;
; CHECK-LABEL: @u32_max2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[N:%.*]], 2
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[N]]
; CHECK-NEXT: store i32 [[N]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC:%.*]] = add i32 [[N]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[N]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY_1:%.*]], label [[DO_END:%.*]]
; CHECK: do.body.1:
; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr i32, i32* [[P]], i32 [[INC]]
; CHECK-NEXT: store i32 [[INC]], i32* [[ARRAYIDX_1]], align 4
; CHECK-NEXT: [[INC_1:%.*]] = add i32 [[INC]], 1
; CHECK-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr i32, i32* [[P]], i32 [[INC_1]]
; CHECK-NEXT: store i32 [[INC_1]], i32* [[ARRAYIDX_2]], align 4
; CHECK-NEXT: br label [[DO_END]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %n, 2
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %do.body ]
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp = icmp ult i32 %i.0, %add
br i1 %cmp, label %do.body, label %do.end ; taken either 0 or 2 times
do.end:
ret void
}
; Should not be unrolled
define void @u32_maxx(i32 %n, i32 %x, i32* %p) {
;
; CHECK-LABEL: @u32_maxx(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[X:%.*]], [[N:%.*]]
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ [[N]], [[ENTRY:%.*]] ], [ [[INC:%.*]], [[DO_BODY]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[I_0]]
; CHECK-NEXT: store i32 [[I_0]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add i32 [[I_0]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[I_0]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY]], label [[DO_END:%.*]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %x, %n
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %do.body ]
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp = icmp ult i32 %i.0, %add
br i1 %cmp, label %do.body, label %do.end ; taken either 0 or x times
do.end:
ret void
}
; Should not be unrolled
define void @u32_max2_unpredictable_exit(i32 %n, i32 %x, i32* %p) {
;
; CHECK-LABEL: @u32_max2_unpredictable_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[N:%.*]], 2
; CHECK-NEXT: br label [[DO_BODY:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ [[N]], [[ENTRY:%.*]] ], [ [[INC:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[I_0]], [[X:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[DO_END:%.*]], label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr i32, i32* [[P:%.*]], i32 [[I_0]]
; CHECK-NEXT: store i32 [[I_0]], i32* [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add i32 [[I_0]], 1
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult i32 [[I_0]], [[ADD]]
; CHECK-NEXT: br i1 [[CMP1]], label [[DO_BODY]], label [[DO_END]]
; CHECK: do.end:
; CHECK-NEXT: ret void
;
entry:
%add = add i32 %n, 2
br label %do.body
do.body:
%i.0 = phi i32 [ %n, %entry ], [ %inc, %if.end ]
%cmp = icmp eq i32 %i.0, %x
br i1 %cmp, label %do.end, label %if.end ; unpredictable
if.end:
%arrayidx = getelementptr i32, i32* %p, i32 %i.0
store i32 %i.0, i32* %arrayidx, align 4
%inc = add i32 %i.0, 1
%cmp1 = icmp ult i32 %i.0, %add
br i1 %cmp1, label %do.body, label %do.end ; taken either 0 or 2 times
do.end:
ret void
}
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