llvm-6502/test/Transforms/InstCombine/vec_extract_elt2.ll
Mon P Wang 7c4efa6808 When InstCombine simplifies a load -> extract element to gep -> load, place
the new load by the old load instead of by the extract element because
a store could have occurred between the load and extract element.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78891 91177308-0d34-0410-b5e6-96231b3b80d8
2009-08-13 05:12:13 +00:00

23 lines
953 B
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | FileCheck %s
; The load replacing the extract element must occur before the call
; that may modify local array a.
declare void @mod_a_func(<4 x float>* %a);
; CHECK: load float* %arraydecay1, align 16
; CHECK: call void @mod_a_func
define void @cl_jpegenc_k2(<4 x float> addrspace(1)* %src, float addrspace(1)* %dst) {
%a = alloca [2 x <4 x float>], align 16
%arraydecay = getelementptr [2 x <4 x float>]* %a, i32 0, i32 0
%arrayidx31 = getelementptr <4 x float> addrspace(1)* %src, i32 0
%tmp32 = load <4 x float> addrspace(1)* %arrayidx31
store <4 x float> %tmp32, <4 x float>* %arraydecay, align 16
%tmp86 = load <4 x float>* %arraydecay, align 16
call void @mod_a_func(<4 x float>* %arraydecay)
%arrayidx132 = getelementptr float addrspace(1)* %dst, i32 0
%tmp236 = extractelement <4 x float> %tmp86, i32 0
store float %tmp236, float addrspace(1)* %arrayidx132
ret void
}