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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-11-07 19:15:58 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-11-07 19:15:58 +0000 |
| commit | 3e5d5c53a03e4a08cdb67f8a7f44567f925be9a5 (patch) | |
| tree | d761303159d13fca2351a75150a2e00d28c58ee6 /test/CodeGen/X86/vec_zero.ll | |
| parent | d83d98d4eb9595a88b830f5e3f5c6c24fae80df1 (diff) | |
Expand V_SET0 to xorps by default.
The xorps instruction is smaller than pxor, so prefer that encoding.
The ExecutionDepsFix pass will switch the encoding to pxor and xorpd
when appropriate.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143996 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/vec_zero.ll')
| -rw-r--r-- | test/CodeGen/X86/vec_zero.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/CodeGen/X86/vec_zero.ll b/test/CodeGen/X86/vec_zero.ll index 4d1f05629b..682a0dfca8 100644 --- a/test/CodeGen/X86/vec_zero.ll +++ b/test/CodeGen/X86/vec_zero.ll @@ -1,5 +1,6 @@ ; RUN: llc < %s -march=x86 -mattr=+sse2 | FileCheck %s +; CHECK: foo ; CHECK: xorps define void @foo(<4 x float>* %P) { %T = load <4 x float>* %P ; <<4 x float>> [#uses=1] @@ -8,6 +9,7 @@ define void @foo(<4 x float>* %P) { ret void } +; CHECK: bar ; CHECK: pxor define void @bar(<4 x i32>* %P) { %T = load <4 x i32>* %P ; <<4 x i32>> [#uses=1] @@ -16,3 +18,13 @@ define void @bar(<4 x i32>* %P) { ret void } +; Without any type hints from operations, we fall back to the smaller xorps. +; The IR type <4 x i32> is ignored. +; CHECK: untyped_zero +; CHECK: xorps +; CHECK: movaps +define void @untyped_zero(<4 x i32>* %p) { +entry: + store <4 x i32> zeroinitializer, <4 x i32>* %p, align 16 + ret void +} |