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TheRock/compiler/amd-llvm/llvm/test/CodeGen/X86/2011-12-26-extractelement-duplicate-load.ll
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

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LLVM

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=x86_64-unknown -mattr=-sse4.2,+sse4.1 < %s | FileCheck %s
; Make sure we don't load from the location pointed to by %p
; twice: it has non-obvious performance implications, and
; the relevant transformation doesn't know how to update
; the chains correctly.
; PR10747
define <4 x i32> @test(ptr %p) {
; CHECK-LABEL: test:
; CHECK: # %bb.0:
; CHECK-NEXT: cmpl $3, 8(%rdi)
; CHECK-NEXT: je .LBB0_1
; CHECK-NEXT: # %bb.2:
; CHECK-NEXT: xorps %xmm0, %xmm0
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB0_1:
; CHECK-NEXT: movaps (%rdi), %xmm0
; CHECK-NEXT: retq
%v = load <4 x i32>, ptr %p
%e = extractelement <4 x i32> %v, i32 2
%cmp = icmp eq i32 %e, 3
%sel = select i1 %cmp, <4 x i32> %v, <4 x i32> zeroinitializer
ret <4 x i32> %sel
}