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| author | Evan Cheng <evan.cheng@apple.com> | 2008-10-06 21:13:08 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-10-06 21:13:08 +0000 |
| commit | 882cdfde516fb97a1fda1a3bbc85b1792aa7659c (patch) | |
| tree | a12486c2bf1e82f14265930dc027a02fbdcbbe29 | |
| parent | 65609f2efa17916f77083a10a9a5239ff2fa1899 (diff) | |
Fix PR2850 and PR2863. Only generate movddup for 128-bit SSE vector shuffles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57210 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 1 | ||||
| -rw-r--r-- | test/CodeGen/X86/2008-10-06-MMXISelBug.ll | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 494ac1d279..d74588e628 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -3954,6 +3954,7 @@ X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) { // Canonicalize movddup shuffles. if (V2IsUndef && Subtarget->hasSSE2() && + VT.getSizeInBits() == 128 && X86::isMOVDDUPMask(PermMask.getNode())) return CanonicalizeMovddup(Op, V1, PermMask, DAG, Subtarget->hasSSE3()); diff --git a/test/CodeGen/X86/2008-10-06-MMXISelBug.ll b/test/CodeGen/X86/2008-10-06-MMXISelBug.ll new file mode 100644 index 0000000000..bd1ad59797 --- /dev/null +++ b/test/CodeGen/X86/2008-10-06-MMXISelBug.ll @@ -0,0 +1,12 @@ +; RUN: llvm-as < %s | llc -march=x86 -mattr=+mmx,+sse2 +; PR2850 + +@tmp_V2i = common global <2 x i32> zeroinitializer ; <<2 x i32>*> [#uses=2] + +define void @f0() nounwind { +entry: + %0 = load <2 x i32>* @tmp_V2i, align 8 ; <<2 x i32>> [#uses=1] + %1 = shufflevector <2 x i32> %0, <2 x i32> undef, <2 x i32> zeroinitializer ; <<2 x i32>> [#uses=1] + store <2 x i32> %1, <2 x i32>* @tmp_V2i, align 8 + ret void +} |