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| author | Eli Friedman <eli.friedman@gmail.com> | 2008-06-19 06:09:51 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2008-06-19 06:09:51 +0000 |
| commit | 2c8e64d3e4a3daca9ec74c617a518d03d33eee90 (patch) | |
| tree | c3da22e58f81480e3ded450d2ed84c89d73ba1af /test/CodeGen | |
| parent | 29b039976fd682716c6b8ed1cb7084226b2ad84b (diff) | |
| download | external_llvm-2c8e64d3e4a3daca9ec74c617a518d03d33eee90.zip external_llvm-2c8e64d3e4a3daca9ec74c617a518d03d33eee90.tar.gz external_llvm-2c8e64d3e4a3daca9ec74c617a518d03d33eee90.tar.bz2 | |
Fix a bug with <8 x i16> shuffle lowering on X86 where parts of the
shuffle could be skipped. The check is invalid because the loop index i
doesn't correspond to the element actually inserted. The correct check is
already done a few lines earlier, for whether the element is already in
the right spot, so this shouldn't have any effect on the codegen for
code that was already correct.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52486 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/2008-06-18-BadShuffle.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2008-06-18-BadShuffle.ll b/test/CodeGen/X86/2008-06-18-BadShuffle.ll new file mode 100644 index 0000000..ba0a1f9 --- /dev/null +++ b/test/CodeGen/X86/2008-06-18-BadShuffle.ll @@ -0,0 +1,10 @@ +; RUN: llvm-as < %s | llc -march=x86 -mcpu=i386 -mattr=+sse2 | grep pinsrw + +; Test to make sure we actually insert the bottom element of the vector +define <8 x i16> @a(<8 x i16> %a) nounwind { +entry: + shufflevector <8 x i16> %a, <8 x i16> zeroinitializer, <8 x i32> < i32 0, i32 8, i32 8, i32 8, i32 8, i32 8, i32 8, i32 8 > + %add = add <8 x i16> %0, %a + ret <8 x i16> %add +} + |