577 lines
20 KiB
LLVM
577 lines
20 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -O3 -mtriple=x86_64-unknown-unknown -mcpu=core2 | FileCheck %s -check-prefix=X64
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; RUN: llc < %s -O3 -mtriple=i686-unknown-unknown -mcpu=core2 | FileCheck %s -check-prefix=X32
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; @simple is the most basic chain of address induction variables. Chaining
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; saves at least one register and avoids complex addressing and setup
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; code.
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;
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; %x * 4
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; no other address computation in the preheader
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; no complex address modes
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;
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; no expensive address computation in the preheader
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; no complex address modes
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define i32 @simple(i32* %a, i32* %b, i32 %x) nounwind {
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; X64-LABEL: simple:
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; X64: # %bb.0: # %entry
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; X64-NEXT: movslq %edx, %rcx
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; X64-NEXT: shlq $2, %rcx
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; X64-NEXT: xorl %eax, %eax
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; X64-NEXT: .p2align 4, 0x90
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; X64-NEXT: .LBB0_1: # %loop
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; X64-NEXT: # =>This Inner Loop Header: Depth=1
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; X64-NEXT: addl (%rdi), %eax
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; X64-NEXT: leaq (%rdi,%rcx), %r8
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; X64-NEXT: addl (%rdi,%rcx), %eax
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; X64-NEXT: leaq (%r8,%rcx), %rdx
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; X64-NEXT: addl (%rcx,%r8), %eax
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; X64-NEXT: addl (%rcx,%rdx), %eax
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; X64-NEXT: addq %rcx, %rdx
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; X64-NEXT: addq %rcx, %rdx
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; X64-NEXT: movq %rdx, %rdi
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; X64-NEXT: cmpq %rsi, %rdx
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; X64-NEXT: jne .LBB0_1
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; X64-NEXT: # %bb.2: # %exit
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; X64-NEXT: retq
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;
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; X32-LABEL: simple:
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; X32: # %bb.0: # %entry
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; X32-NEXT: pushl %ebx
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; X32-NEXT: pushl %edi
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; X32-NEXT: pushl %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
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; X32-NEXT: shll $2, %edx
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; X32-NEXT: xorl %eax, %eax
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; X32-NEXT: .p2align 4, 0x90
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; X32-NEXT: .LBB0_1: # %loop
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; X32-NEXT: # =>This Inner Loop Header: Depth=1
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; X32-NEXT: addl (%esi), %eax
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; X32-NEXT: leal (%esi,%edx), %edi
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; X32-NEXT: addl (%esi,%edx), %eax
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; X32-NEXT: leal (%edi,%edx), %ebx
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; X32-NEXT: addl (%edx,%edi), %eax
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; X32-NEXT: addl (%edx,%ebx), %eax
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; X32-NEXT: addl %edx, %ebx
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; X32-NEXT: addl %edx, %ebx
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; X32-NEXT: movl %ebx, %esi
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; X32-NEXT: cmpl %ecx, %ebx
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; X32-NEXT: jne .LBB0_1
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; X32-NEXT: # %bb.2: # %exit
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; X32-NEXT: popl %esi
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; X32-NEXT: popl %edi
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; X32-NEXT: popl %ebx
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; X32-NEXT: retl
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entry:
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br label %loop
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loop:
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%iv = phi i32* [ %a, %entry ], [ %iv4, %loop ]
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%s = phi i32 [ 0, %entry ], [ %s4, %loop ]
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%v = load i32, i32* %iv
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%iv1 = getelementptr inbounds i32, i32* %iv, i32 %x
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%v1 = load i32, i32* %iv1
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%iv2 = getelementptr inbounds i32, i32* %iv1, i32 %x
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%v2 = load i32, i32* %iv2
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%iv3 = getelementptr inbounds i32, i32* %iv2, i32 %x
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%v3 = load i32, i32* %iv3
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%s1 = add i32 %s, %v
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%s2 = add i32 %s1, %v1
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%s3 = add i32 %s2, %v2
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%s4 = add i32 %s3, %v3
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%iv4 = getelementptr inbounds i32, i32* %iv3, i32 %x
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%cmp = icmp eq i32* %iv4, %b
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br i1 %cmp, label %exit, label %loop
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exit:
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ret i32 %s4
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}
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; @user is not currently chained because the IV is live across memory ops.
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;
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; expensive address computation in the preheader
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; complex address modes
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define i32 @user(i32* %a, i32* %b, i32 %x) nounwind {
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; X64-LABEL: user:
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; X64: # %bb.0: # %entry
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; X64-NEXT: movslq %edx, %rcx
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; X64-NEXT: movq %rcx, %rdx
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; X64-NEXT: shlq $4, %rdx
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; X64-NEXT: leaq (,%rcx,4), %rax
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; X64-NEXT: leaq (%rax,%rax,2), %r8
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; X64-NEXT: xorl %eax, %eax
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; X64-NEXT: .p2align 4, 0x90
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; X64-NEXT: .LBB1_1: # %loop
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; X64-NEXT: # =>This Inner Loop Header: Depth=1
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; X64-NEXT: addl (%rdi), %eax
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; X64-NEXT: addl (%rdi,%rcx,4), %eax
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; X64-NEXT: addl (%rdi,%rcx,8), %eax
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; X64-NEXT: addl (%rdi,%r8), %eax
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; X64-NEXT: movl %eax, (%rdi)
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; X64-NEXT: addq %rdx, %rdi
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; X64-NEXT: cmpq %rdi, %rsi
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; X64-NEXT: jne .LBB1_1
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; X64-NEXT: # %bb.2: # %exit
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; X64-NEXT: retq
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;
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; X32-LABEL: user:
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; X32: # %bb.0: # %entry
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; X32-NEXT: pushl %ebx
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; X32-NEXT: pushl %edi
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; X32-NEXT: pushl %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %esi
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; X32-NEXT: movl %ecx, %edi
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; X32-NEXT: shll $4, %edi
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; X32-NEXT: leal (,%ecx,4), %eax
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; X32-NEXT: leal (%eax,%eax,2), %ebx
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; X32-NEXT: xorl %eax, %eax
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; X32-NEXT: .p2align 4, 0x90
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; X32-NEXT: .LBB1_1: # %loop
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; X32-NEXT: # =>This Inner Loop Header: Depth=1
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; X32-NEXT: addl (%esi), %eax
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; X32-NEXT: addl (%esi,%ecx,4), %eax
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; X32-NEXT: addl (%esi,%ecx,8), %eax
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; X32-NEXT: addl (%esi,%ebx), %eax
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; X32-NEXT: movl %eax, (%esi)
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; X32-NEXT: addl %edi, %esi
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; X32-NEXT: cmpl %esi, %edx
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; X32-NEXT: jne .LBB1_1
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; X32-NEXT: # %bb.2: # %exit
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; X32-NEXT: popl %esi
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; X32-NEXT: popl %edi
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; X32-NEXT: popl %ebx
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; X32-NEXT: retl
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entry:
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br label %loop
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loop:
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%iv = phi i32* [ %a, %entry ], [ %iv4, %loop ]
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%s = phi i32 [ 0, %entry ], [ %s4, %loop ]
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%v = load i32, i32* %iv
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%iv1 = getelementptr inbounds i32, i32* %iv, i32 %x
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%v1 = load i32, i32* %iv1
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%iv2 = getelementptr inbounds i32, i32* %iv1, i32 %x
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%v2 = load i32, i32* %iv2
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%iv3 = getelementptr inbounds i32, i32* %iv2, i32 %x
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%v3 = load i32, i32* %iv3
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%s1 = add i32 %s, %v
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%s2 = add i32 %s1, %v1
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%s3 = add i32 %s2, %v2
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%s4 = add i32 %s3, %v3
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%iv4 = getelementptr inbounds i32, i32* %iv3, i32 %x
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store i32 %s4, i32* %iv
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%cmp = icmp eq i32* %iv4, %b
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br i1 %cmp, label %exit, label %loop
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exit:
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ret i32 %s4
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}
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; @extrastride is a slightly more interesting case of a single
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; complete chain with multiple strides. The test case IR is what LSR
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; used to do, and exactly what we don't want to do. LSR's new IV
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; chaining feature should now undo the damage.
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;
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; We currently don't handle this on X64 because the sexts cause
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; strange increment expressions like this:
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; IV + ((sext i32 (2 * %s) to i64) + (-1 * (sext i32 %s to i64)))
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;
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; For x32, no spills in the preheader, no complex address modes, no reloads.
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define void @extrastride(i8* nocapture %main, i32 %main_stride, i32* nocapture %res, i32 %x, i32 %y, i32 %z) nounwind {
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; X64-LABEL: extrastride:
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; X64: # %bb.0: # %entry
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; X64-NEXT: pushq %rbp
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; X64-NEXT: pushq %r14
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; X64-NEXT: pushq %rbx
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; X64-NEXT: # kill: def $ecx killed $ecx def $rcx
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; X64-NEXT: # kill: def $esi killed $esi def $rsi
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; X64-NEXT: testl %r9d, %r9d
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; X64-NEXT: je .LBB2_3
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; X64-NEXT: # %bb.1: # %for.body.lr.ph
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; X64-NEXT: leal (%rsi,%rsi), %r14d
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; X64-NEXT: leal (%rsi,%rsi,2), %ebx
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; X64-NEXT: addl %esi, %ecx
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; X64-NEXT: leal (,%rsi,4), %eax
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; X64-NEXT: leal (%rcx,%rsi,4), %ebp
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; X64-NEXT: movslq %eax, %r10
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; X64-NEXT: movslq %ebx, %r11
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; X64-NEXT: movslq %r14d, %rbx
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; X64-NEXT: movslq %esi, %rsi
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; X64-NEXT: movslq %r8d, %rcx
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; X64-NEXT: shlq $2, %rcx
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; X64-NEXT: movslq %ebp, %rax
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; X64-NEXT: .p2align 4, 0x90
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; X64-NEXT: .LBB2_2: # %for.body
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; X64-NEXT: # =>This Inner Loop Header: Depth=1
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; X64-NEXT: movl (%rdi,%rsi), %ebp
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; X64-NEXT: addl (%rdi), %ebp
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; X64-NEXT: addl (%rdi,%rbx), %ebp
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; X64-NEXT: addl (%rdi,%r11), %ebp
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; X64-NEXT: addl (%rdi,%r10), %ebp
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; X64-NEXT: movl %ebp, (%rdx)
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; X64-NEXT: addq %rax, %rdi
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; X64-NEXT: addq %rcx, %rdx
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; X64-NEXT: decl %r9d
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; X64-NEXT: jne .LBB2_2
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; X64-NEXT: .LBB2_3: # %for.end
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; X64-NEXT: popq %rbx
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; X64-NEXT: popq %r14
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; X64-NEXT: popq %rbp
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; X64-NEXT: retq
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;
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; X32-LABEL: extrastride:
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; X32: # %bb.0: # %entry
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; X32-NEXT: pushl %ebp
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; X32-NEXT: pushl %ebx
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; X32-NEXT: pushl %edi
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; X32-NEXT: pushl %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X32-NEXT: testl %eax, %eax
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; X32-NEXT: je .LBB2_3
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; X32-NEXT: # %bb.1: # %for.body.lr.ph
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %esi
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ebx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %edi
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; X32-NEXT: addl %esi, %edi
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; X32-NEXT: shll $2, %ecx
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; X32-NEXT: .p2align 4, 0x90
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; X32-NEXT: .LBB2_2: # %for.body
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; X32-NEXT: # =>This Inner Loop Header: Depth=1
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; X32-NEXT: movl (%ebx,%esi), %ebp
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; X32-NEXT: addl (%ebx), %ebp
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; X32-NEXT: leal (%ebx,%esi), %ebx
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; X32-NEXT: addl (%esi,%ebx), %ebp
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; X32-NEXT: leal (%ebx,%esi), %ebx
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; X32-NEXT: addl (%esi,%ebx), %ebp
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; X32-NEXT: leal (%ebx,%esi), %ebx
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; X32-NEXT: addl (%esi,%ebx), %ebp
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; X32-NEXT: movl %ebp, (%edx)
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; X32-NEXT: leal (%ebx,%esi), %ebx
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; X32-NEXT: addl %edi, %ebx
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; X32-NEXT: addl %ecx, %edx
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; X32-NEXT: decl %eax
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; X32-NEXT: jne .LBB2_2
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; X32-NEXT: .LBB2_3: # %for.end
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; X32-NEXT: popl %esi
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; X32-NEXT: popl %edi
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; X32-NEXT: popl %ebx
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; X32-NEXT: popl %ebp
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; X32-NEXT: retl
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entry:
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%cmp8 = icmp eq i32 %z, 0
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br i1 %cmp8, label %for.end, label %for.body.lr.ph
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for.body.lr.ph: ; preds = %entry
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%add.ptr.sum = shl i32 %main_stride, 1 ; s*2
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%add.ptr1.sum = add i32 %add.ptr.sum, %main_stride ; s*3
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%add.ptr2.sum = add i32 %x, %main_stride ; s + x
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%add.ptr4.sum = shl i32 %main_stride, 2 ; s*4
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%add.ptr3.sum = add i32 %add.ptr2.sum, %add.ptr4.sum ; total IV stride = s*5+x
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br label %for.body
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for.body: ; preds = %for.body.lr.ph, %for.body
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%main.addr.011 = phi i8* [ %main, %for.body.lr.ph ], [ %add.ptr6, %for.body ]
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%i.010 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
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%res.addr.09 = phi i32* [ %res, %for.body.lr.ph ], [ %add.ptr7, %for.body ]
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%0 = bitcast i8* %main.addr.011 to i32*
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%1 = load i32, i32* %0, align 4
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%add.ptr = getelementptr inbounds i8, i8* %main.addr.011, i32 %main_stride
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%2 = bitcast i8* %add.ptr to i32*
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%3 = load i32, i32* %2, align 4
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%add.ptr1 = getelementptr inbounds i8, i8* %main.addr.011, i32 %add.ptr.sum
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%4 = bitcast i8* %add.ptr1 to i32*
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%5 = load i32, i32* %4, align 4
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%add.ptr2 = getelementptr inbounds i8, i8* %main.addr.011, i32 %add.ptr1.sum
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%6 = bitcast i8* %add.ptr2 to i32*
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%7 = load i32, i32* %6, align 4
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%add.ptr3 = getelementptr inbounds i8, i8* %main.addr.011, i32 %add.ptr4.sum
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%8 = bitcast i8* %add.ptr3 to i32*
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%9 = load i32, i32* %8, align 4
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%add = add i32 %3, %1
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%add4 = add i32 %add, %5
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%add5 = add i32 %add4, %7
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%add6 = add i32 %add5, %9
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store i32 %add6, i32* %res.addr.09, align 4
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%add.ptr6 = getelementptr inbounds i8, i8* %main.addr.011, i32 %add.ptr3.sum
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%add.ptr7 = getelementptr inbounds i32, i32* %res.addr.09, i32 %y
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%inc = add i32 %i.010, 1
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%cmp = icmp eq i32 %inc, %z
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br i1 %cmp, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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; @foldedidx is an unrolled variant of this loop:
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; for (unsigned long i = 0; i < len; i += s) {
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; c[i] = a[i] + b[i];
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; }
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; where 's' can be folded into the addressing mode.
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; Consequently, we should *not* form any chains.
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define void @foldedidx(i8* nocapture %a, i8* nocapture %b, i8* nocapture %c) nounwind ssp {
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; X64-LABEL: foldedidx:
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; X64: # %bb.0: # %entry
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; X64-NEXT: movl $3, %eax
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; X64-NEXT: .p2align 4, 0x90
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; X64-NEXT: .LBB3_1: # %for.body
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; X64-NEXT: # =>This Inner Loop Header: Depth=1
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; X64-NEXT: movzbl -3(%rdi,%rax), %r8d
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; X64-NEXT: movzbl -3(%rsi,%rax), %ecx
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; X64-NEXT: addl %r8d, %ecx
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; X64-NEXT: movb %cl, -3(%rdx,%rax)
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; X64-NEXT: movzbl -2(%rdi,%rax), %r8d
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; X64-NEXT: movzbl -2(%rsi,%rax), %ecx
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; X64-NEXT: addl %r8d, %ecx
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; X64-NEXT: movb %cl, -2(%rdx,%rax)
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; X64-NEXT: movzbl -1(%rdi,%rax), %r8d
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; X64-NEXT: movzbl -1(%rsi,%rax), %ecx
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; X64-NEXT: addl %r8d, %ecx
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; X64-NEXT: movb %cl, -1(%rdx,%rax)
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; X64-NEXT: movzbl (%rdi,%rax), %r8d
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; X64-NEXT: movzbl (%rsi,%rax), %ecx
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; X64-NEXT: addl %r8d, %ecx
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; X64-NEXT: movb %cl, (%rdx,%rax)
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; X64-NEXT: addq $4, %rax
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; X64-NEXT: cmpl $403, %eax # imm = 0x193
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; X64-NEXT: jne .LBB3_1
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; X64-NEXT: # %bb.2: # %for.end
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; X64-NEXT: retq
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;
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; X32-LABEL: foldedidx:
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; X32: # %bb.0: # %entry
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; X32-NEXT: pushl %ebx
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; X32-NEXT: pushl %edi
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; X32-NEXT: pushl %esi
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; X32-NEXT: movl $3, %eax
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; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
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; X32-NEXT: movl {{[0-9]+}}(%esp), %esi
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; X32-NEXT: .p2align 4, 0x90
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; X32-NEXT: .LBB3_1: # %for.body
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; X32-NEXT: # =>This Inner Loop Header: Depth=1
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; X32-NEXT: movzbl -3(%esi,%eax), %edi
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; X32-NEXT: movzbl -3(%edx,%eax), %ebx
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; X32-NEXT: addl %edi, %ebx
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; X32-NEXT: movb %bl, -3(%ecx,%eax)
|
|
; X32-NEXT: movzbl -2(%esi,%eax), %edi
|
|
; X32-NEXT: movzbl -2(%edx,%eax), %ebx
|
|
; X32-NEXT: addl %edi, %ebx
|
|
; X32-NEXT: movb %bl, -2(%ecx,%eax)
|
|
; X32-NEXT: movzbl -1(%esi,%eax), %edi
|
|
; X32-NEXT: movzbl -1(%edx,%eax), %ebx
|
|
; X32-NEXT: addl %edi, %ebx
|
|
; X32-NEXT: movb %bl, -1(%ecx,%eax)
|
|
; X32-NEXT: movzbl (%esi,%eax), %edi
|
|
; X32-NEXT: movzbl (%edx,%eax), %ebx
|
|
; X32-NEXT: addl %edi, %ebx
|
|
; X32-NEXT: movb %bl, (%ecx,%eax)
|
|
; X32-NEXT: addl $4, %eax
|
|
; X32-NEXT: cmpl $403, %eax # imm = 0x193
|
|
; X32-NEXT: jne .LBB3_1
|
|
; X32-NEXT: # %bb.2: # %for.end
|
|
; X32-NEXT: popl %esi
|
|
; X32-NEXT: popl %edi
|
|
; X32-NEXT: popl %ebx
|
|
; X32-NEXT: retl
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%i.07 = phi i32 [ 0, %entry ], [ %inc.3, %for.body ]
|
|
%arrayidx = getelementptr inbounds i8, i8* %a, i32 %i.07
|
|
%0 = load i8, i8* %arrayidx, align 1
|
|
%conv5 = zext i8 %0 to i32
|
|
%arrayidx1 = getelementptr inbounds i8, i8* %b, i32 %i.07
|
|
%1 = load i8, i8* %arrayidx1, align 1
|
|
%conv26 = zext i8 %1 to i32
|
|
%add = add nsw i32 %conv26, %conv5
|
|
%conv3 = trunc i32 %add to i8
|
|
%arrayidx4 = getelementptr inbounds i8, i8* %c, i32 %i.07
|
|
store i8 %conv3, i8* %arrayidx4, align 1
|
|
%inc1 = or i32 %i.07, 1
|
|
%arrayidx.1 = getelementptr inbounds i8, i8* %a, i32 %inc1
|
|
%2 = load i8, i8* %arrayidx.1, align 1
|
|
%conv5.1 = zext i8 %2 to i32
|
|
%arrayidx1.1 = getelementptr inbounds i8, i8* %b, i32 %inc1
|
|
%3 = load i8, i8* %arrayidx1.1, align 1
|
|
%conv26.1 = zext i8 %3 to i32
|
|
%add.1 = add nsw i32 %conv26.1, %conv5.1
|
|
%conv3.1 = trunc i32 %add.1 to i8
|
|
%arrayidx4.1 = getelementptr inbounds i8, i8* %c, i32 %inc1
|
|
store i8 %conv3.1, i8* %arrayidx4.1, align 1
|
|
%inc.12 = or i32 %i.07, 2
|
|
%arrayidx.2 = getelementptr inbounds i8, i8* %a, i32 %inc.12
|
|
%4 = load i8, i8* %arrayidx.2, align 1
|
|
%conv5.2 = zext i8 %4 to i32
|
|
%arrayidx1.2 = getelementptr inbounds i8, i8* %b, i32 %inc.12
|
|
%5 = load i8, i8* %arrayidx1.2, align 1
|
|
%conv26.2 = zext i8 %5 to i32
|
|
%add.2 = add nsw i32 %conv26.2, %conv5.2
|
|
%conv3.2 = trunc i32 %add.2 to i8
|
|
%arrayidx4.2 = getelementptr inbounds i8, i8* %c, i32 %inc.12
|
|
store i8 %conv3.2, i8* %arrayidx4.2, align 1
|
|
%inc.23 = or i32 %i.07, 3
|
|
%arrayidx.3 = getelementptr inbounds i8, i8* %a, i32 %inc.23
|
|
%6 = load i8, i8* %arrayidx.3, align 1
|
|
%conv5.3 = zext i8 %6 to i32
|
|
%arrayidx1.3 = getelementptr inbounds i8, i8* %b, i32 %inc.23
|
|
%7 = load i8, i8* %arrayidx1.3, align 1
|
|
%conv26.3 = zext i8 %7 to i32
|
|
%add.3 = add nsw i32 %conv26.3, %conv5.3
|
|
%conv3.3 = trunc i32 %add.3 to i8
|
|
%arrayidx4.3 = getelementptr inbounds i8, i8* %c, i32 %inc.23
|
|
store i8 %conv3.3, i8* %arrayidx4.3, align 1
|
|
%inc.3 = add nsw i32 %i.07, 4
|
|
%exitcond.3 = icmp eq i32 %inc.3, 400
|
|
br i1 %exitcond.3, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
; @multioper tests instructions with multiple IV user operands. We
|
|
; should be able to chain them independent of each other.
|
|
|
|
define void @multioper(i32* %a, i32 %n) nounwind {
|
|
; X64-LABEL: multioper:
|
|
; X64: # %bb.0: # %entry
|
|
; X64-NEXT: xorl %eax, %eax
|
|
; X64-NEXT: .p2align 4, 0x90
|
|
; X64-NEXT: .LBB4_1: # %for.body
|
|
; X64-NEXT: # =>This Inner Loop Header: Depth=1
|
|
; X64-NEXT: movl %eax, (%rdi,%rax,4)
|
|
; X64-NEXT: leal 1(%rax), %ecx
|
|
; X64-NEXT: movl %ecx, 4(%rdi,%rax,4)
|
|
; X64-NEXT: leal 2(%rax), %ecx
|
|
; X64-NEXT: movl %ecx, 8(%rdi,%rax,4)
|
|
; X64-NEXT: leal 3(%rax), %ecx
|
|
; X64-NEXT: movl %ecx, 12(%rdi,%rax,4)
|
|
; X64-NEXT: addq $4, %rax
|
|
; X64-NEXT: cmpl %esi, %eax
|
|
; X64-NEXT: jl .LBB4_1
|
|
; X64-NEXT: # %bb.2: # %exit
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: multioper:
|
|
; X32: # %bb.0: # %entry
|
|
; X32-NEXT: pushl %esi
|
|
; X32-NEXT: xorl %eax, %eax
|
|
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
|
|
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
|
|
; X32-NEXT: .p2align 4, 0x90
|
|
; X32-NEXT: .LBB4_1: # %for.body
|
|
; X32-NEXT: # =>This Inner Loop Header: Depth=1
|
|
; X32-NEXT: movl %eax, (%edx,%eax,4)
|
|
; X32-NEXT: leal 1(%eax), %esi
|
|
; X32-NEXT: movl %esi, 4(%edx,%eax,4)
|
|
; X32-NEXT: leal 2(%eax), %esi
|
|
; X32-NEXT: movl %esi, 8(%edx,%eax,4)
|
|
; X32-NEXT: leal 3(%eax), %esi
|
|
; X32-NEXT: movl %esi, 12(%edx,%eax,4)
|
|
; X32-NEXT: addl $4, %eax
|
|
; X32-NEXT: cmpl %ecx, %eax
|
|
; X32-NEXT: jl .LBB4_1
|
|
; X32-NEXT: # %bb.2: # %exit
|
|
; X32-NEXT: popl %esi
|
|
; X32-NEXT: retl
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body:
|
|
%p = phi i32* [ %p.next, %for.body ], [ %a, %entry ]
|
|
%i = phi i32 [ %inc4, %for.body ], [ 0, %entry ]
|
|
store i32 %i, i32* %p, align 4
|
|
%inc1 = or i32 %i, 1
|
|
%add.ptr.i1 = getelementptr inbounds i32, i32* %p, i32 1
|
|
store i32 %inc1, i32* %add.ptr.i1, align 4
|
|
%inc2 = add nsw i32 %i, 2
|
|
%add.ptr.i2 = getelementptr inbounds i32, i32* %p, i32 2
|
|
store i32 %inc2, i32* %add.ptr.i2, align 4
|
|
%inc3 = add nsw i32 %i, 3
|
|
%add.ptr.i3 = getelementptr inbounds i32, i32* %p, i32 3
|
|
store i32 %inc3, i32* %add.ptr.i3, align 4
|
|
%p.next = getelementptr inbounds i32, i32* %p, i32 4
|
|
%inc4 = add nsw i32 %i, 4
|
|
%cmp = icmp slt i32 %inc4, %n
|
|
br i1 %cmp, label %for.body, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
; @testCmpZero has a ICmpZero LSR use that should not be hidden from
|
|
; LSR. Profitable chains should have more than one nonzero increment
|
|
; anyway.
|
|
|
|
define void @testCmpZero(i8* %src, i8* %dst, i32 %srcidx, i32 %dstidx, i32 %len) nounwind ssp {
|
|
; X64-LABEL: testCmpZero:
|
|
; X64: # %bb.0: # %entry
|
|
; X64-NEXT: movslq %edx, %rdx
|
|
; X64-NEXT: addq %rdx, %rdi
|
|
; X64-NEXT: movslq %ecx, %r9
|
|
; X64-NEXT: addq %rsi, %r9
|
|
; X64-NEXT: addl %edx, %r8d
|
|
; X64-NEXT: movslq %r8d, %rcx
|
|
; X64-NEXT: subq %rdx, %rcx
|
|
; X64-NEXT: xorl %edx, %edx
|
|
; X64-NEXT: .p2align 4, 0x90
|
|
; X64-NEXT: .LBB5_1: # %for.body82.us
|
|
; X64-NEXT: # =>This Inner Loop Header: Depth=1
|
|
; X64-NEXT: movzbl (%r9,%rdx,4), %eax
|
|
; X64-NEXT: movb %al, (%rdi,%rdx)
|
|
; X64-NEXT: incq %rdx
|
|
; X64-NEXT: cmpq %rdx, %rcx
|
|
; X64-NEXT: jne .LBB5_1
|
|
; X64-NEXT: # %bb.2: # %return
|
|
; X64-NEXT: retq
|
|
;
|
|
; X32-LABEL: testCmpZero:
|
|
; X32: # %bb.0: # %entry
|
|
; X32-NEXT: pushl %ebx
|
|
; X32-NEXT: pushl %esi
|
|
; X32-NEXT: movl {{[0-9]+}}(%esp), %eax
|
|
; X32-NEXT: movl {{[0-9]+}}(%esp), %ecx
|
|
; X32-NEXT: addl {{[0-9]+}}(%esp), %ecx
|
|
; X32-NEXT: movl {{[0-9]+}}(%esp), %edx
|
|
; X32-NEXT: addl {{[0-9]+}}(%esp), %edx
|
|
; X32-NEXT: xorl %esi, %esi
|
|
; X32-NEXT: .p2align 4, 0x90
|
|
; X32-NEXT: .LBB5_1: # %for.body82.us
|
|
; X32-NEXT: # =>This Inner Loop Header: Depth=1
|
|
; X32-NEXT: movzbl (%edx,%esi,4), %ebx
|
|
; X32-NEXT: movb %bl, (%ecx,%esi)
|
|
; X32-NEXT: incl %esi
|
|
; X32-NEXT: cmpl %esi, %eax
|
|
; X32-NEXT: jne .LBB5_1
|
|
; X32-NEXT: # %bb.2: # %return
|
|
; X32-NEXT: popl %esi
|
|
; X32-NEXT: popl %ebx
|
|
; X32-NEXT: retl
|
|
entry:
|
|
%dest0 = getelementptr inbounds i8, i8* %src, i32 %srcidx
|
|
%source0 = getelementptr inbounds i8, i8* %dst, i32 %dstidx
|
|
%add.ptr79.us.sum = add i32 %srcidx, %len
|
|
%lftr.limit = getelementptr i8, i8* %src, i32 %add.ptr79.us.sum
|
|
br label %for.body82.us
|
|
|
|
for.body82.us:
|
|
%dest = phi i8* [ %dest0, %entry ], [ %incdec.ptr91.us, %for.body82.us ]
|
|
%source = phi i8* [ %source0, %entry ], [ %add.ptr83.us, %for.body82.us ]
|
|
%0 = bitcast i8* %source to i32*
|
|
%1 = load i32, i32* %0, align 4
|
|
%trunc = trunc i32 %1 to i8
|
|
%add.ptr83.us = getelementptr inbounds i8, i8* %source, i32 4
|
|
%incdec.ptr91.us = getelementptr inbounds i8, i8* %dest, i32 1
|
|
store i8 %trunc, i8* %dest, align 1
|
|
%exitcond = icmp eq i8* %incdec.ptr91.us, %lftr.limit
|
|
br i1 %exitcond, label %return, label %for.body82.us
|
|
|
|
return:
|
|
ret void
|
|
}
|