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39 lines
1.4 KiB
LLVM
39 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-linux -mattr=+sse4.2 | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mtriple=x86_64-linux -mattr=+sse4.2 | FileCheck %s --check-prefix=X64
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; PR4891
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; Both loads should happen before either store.
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define void @short2_int_swap(<2 x i16>* nocapture %b, i32* nocapture %c) nounwind {
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; X86-LABEL: short2_int_swap:
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; X86: # BB#0: # %entry
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; X86-NEXT: pushl %esi
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; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
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; X86-NEXT: movl (%ecx), %edx
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; X86-NEXT: movl (%eax), %esi
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; X86-NEXT: movl %edx, (%eax)
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; X86-NEXT: movl %esi, (%ecx)
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; X86-NEXT: popl %esi
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; X86-NEXT: retl
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;
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; X64-LABEL: short2_int_swap:
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; X64: # BB#0: # %entry
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; X64-NEXT: movl (%rsi), %eax
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; X64-NEXT: movl (%rdi), %ecx
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; X64-NEXT: movl %eax, (%rdi)
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; X64-NEXT: movl %ecx, (%rsi)
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; X64-NEXT: retq
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entry:
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%0 = load <2 x i16>, <2 x i16>* %b, align 2 ; <<2 x i16>> [#uses=1]
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%1 = load i32, i32* %c, align 4 ; <i32> [#uses=1]
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%tmp1 = bitcast i32 %1 to <2 x i16> ; <<2 x i16>> [#uses=1]
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store <2 x i16> %tmp1, <2 x i16>* %b, align 2
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%tmp5 = bitcast <2 x i16> %0 to <1 x i32> ; <<1 x i32>> [#uses=1]
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%tmp3 = extractelement <1 x i32> %tmp5, i32 0 ; <i32> [#uses=1]
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store i32 %tmp3, i32* %c, align 4
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ret void
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}
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