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author | Nadav Rotem <nadav.rotem@intel.com> | 2011-08-10 19:30:14 +0000 |
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committer | Nadav Rotem <nadav.rotem@intel.com> | 2011-08-10 19:30:14 +0000 |
commit | 614061bfb4fea3c1233ecf2676282e063724ae93 (patch) | |
tree | 39b076801d61771df2fc6bd98eb4c2f281c924e5 /test | |
parent | 103b8e653c981fe916b855f1b96cb35e01c4543e (diff) | |
download | external_llvm-614061bfb4fea3c1233ecf2676282e063724ae93.zip external_llvm-614061bfb4fea3c1233ecf2676282e063724ae93.tar.gz external_llvm-614061bfb4fea3c1233ecf2676282e063724ae93.tar.bz2 |
When performing a truncating store, it is sometimes possible to rearrange the
data in-register prior to saving to memory. When we reorder the data in memory
we prevent the need to save multiple scalars to memory, making a single regular
store.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137238 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/CodeGen/X86/opt-shuff-tstore.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/CodeGen/X86/opt-shuff-tstore.ll b/test/CodeGen/X86/opt-shuff-tstore.ll new file mode 100644 index 0000000..4596068 --- /dev/null +++ b/test/CodeGen/X86/opt-shuff-tstore.ll @@ -0,0 +1,39 @@ +; RUN: llc -mcpu=corei7 < %s -o - -promote-elements -mattr=+sse2,+sse41 | FileCheck %s + +; CHECK: func_4_8 +; A single memory write +; CHECK: movd +; CHECK-NEXT: ret +define void @func_4_8(<4 x i8> %param, <4 x i8>* %p) { + %r = add <4 x i8> %param, <i8 1, i8 2, i8 3, i8 4> + store <4 x i8> %r, <4 x i8>* %p + ret void +} + +; CHECK: func_4_16 +; CHECK: movq +; CHECK-NEXT: ret +define void @func_4_16(<4 x i16> %param, <4 x i16>* %p) { + %r = add <4 x i16> %param, <i16 1, i16 2, i16 3, i16 4> + store <4 x i16> %r, <4 x i16>* %p + ret void +} + +; CHECK: func_8_8 +; CHECK: movq +; CHECK-NEXT: ret +define void @func_8_8(<8 x i8> %param, <8 x i8>* %p) { + %r = add <8 x i8> %param, <i8 1, i8 2, i8 3, i8 4, i8 1, i8 2, i8 3, i8 4> + store <8 x i8> %r, <8 x i8>* %p + ret void +} + +; CHECK: func_2_32 +; CHECK: movq +; CHECK-NEXT: ret +define void @func_2_32(<2 x i32> %param, <2 x i32>* %p) { + %r = add <2 x i32> %param, <i32 1, i32 2> + store <2 x i32> %r, <2 x i32>* %p + ret void +} + |