Revert "[x86] Fold extract_vector_elt of a load into the Load's address computation."

There's a bug where this can create cycles in the DAG. It will take a bit
to fix, so I'm backing it out for now.

llvm-svn: 213339

1 files changed, 1 insertions, 19 deletions

diff --git a/llvm/test/CodeGen/X86/vec_splat.ll b/llvm/test/CodeGen/X86/vec_splat.ll
index 28f2a9074cb..a02e3836078 100644
--- a/llvm/test/CodeGen/X86/vec_splat.ll
+++ b/llvm/test/CodeGen/X86/vec_splat.ll
@@ -1,6 +1,5 @@
 ; RUN: llc < %s -march=x86 -mcpu=pentium4 -mattr=+sse2 | FileCheck %s -check-prefix=SSE2
 ; RUN: llc < %s -march=x86 -mcpu=pentium4 -mattr=+sse3 | FileCheck %s -check-prefix=SSE3
-; RUN: llc < %s -march=x86-64 -mattr=+avx | FileCheck %s -check-prefix=AVX
 
 define void @test_v4sf(<4 x float>* %P, <4 x float>* %Q, float %X) nounwind {
 	%tmp = insertelement <4 x float> zeroinitializer, float %X, i32 0		; <<4 x float>> [#uses=1]
@@ -38,23 +37,6 @@ define void @test_v2sd(<2 x double>* %P, <2 x double>* %Q, double %X) nounwind {
 define <4 x float> @load_extract_splat(<4 x float>* nocapture readonly %ptr, i64 %i, i64 %j) nounwind {
   %1 = getelementptr inbounds <4 x float>* %ptr, i64 %i
   %2 = load <4 x float>* %1, align 16
-  %3 = trunc i64 %j to i32
-  %4 = extractelement <4 x float> %2, i32 %3
-  %5 = insertelement <4 x float> undef, float %4, i32 0
-  %6 = insertelement <4 x float> %5, float %4, i32 1
-  %7 = insertelement <4 x float> %6, float %4, i32 2
-  %8 = insertelement <4 x float> %7, float %4, i32 3
-  ret <4 x float> %8
-  
-; AVX-LABEL: load_extract_splat
-; AVX-NOT: rsp
-; AVX: vbroadcastss
-}
-
-; Fold extract of a load into the load's address computation. This avoids spilling to the stack.
-define <4 x float> @load_extract_splat1(<4 x float>* nocapture readonly %ptr, i64 %i, i64 %j) nounwind {
-  %1 = getelementptr inbounds <4 x float>* %ptr, i64 %i
-  %2 = load <4 x float>* %1, align 16
   %3 = extractelement <4 x float> %2, i64 %j
   %4 = insertelement <4 x float> undef, float %3, i32 0
   %5 = insertelement <4 x float> %4, float %3, i32 1
@@ -62,7 +44,7 @@ define <4 x float> @load_extract_splat1(<4 x float>* nocapture readonly %ptr, i6
   %7 = insertelement <4 x float> %6, float %3, i32 3
   ret <4 x float> %7
   
-; AVX-LABEL: load_extract_splat1
+; AVX-LABEL: load_extract_splat
 ; AVX-NOT: movs
 ; AVX: vbroadcastss
 }