[llvm-commits] [llvm] r57210 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp test/CodeGen/X86/2008-10-06-MMXISelBug.ll

[Evan Cheng]

Author: evancheng
Date: Mon Oct  6 16:13:08 2008
New Revision: 57210

URL: http://llvm.org/viewvc/llvm-project?rev=57210&view=rev
Log:
Fix PR2850 and PR2863. Only generate movddup for 128-bit SSE vector shuffles.

Added:
    llvm/trunk/test/CodeGen/X86/2008-10-06-MMXISelBug.ll
Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=57210&r1=57209&r2=57210&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Oct  6 16:13:08 2008
@@ -3954,6 +3954,7 @@
 
   // Canonicalize movddup shuffles.
   if (V2IsUndef && Subtarget->hasSSE2() &&
+      VT.getSizeInBits() == 128 &&
       X86::isMOVDDUPMask(PermMask.getNode()))
     return CanonicalizeMovddup(Op, V1, PermMask, DAG, Subtarget->hasSSE3());
 

Added: llvm/trunk/test/CodeGen/X86/2008-10-06-MMXISelBug.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/2008-10-06-MMXISelBug.ll?rev=57210&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/X86/2008-10-06-MMXISelBug.ll (added)
+++ llvm/trunk/test/CodeGen/X86/2008-10-06-MMXISelBug.ll Mon Oct  6 16:13:08 2008
@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=+mmx,+sse2
+; PR2850
+
+ at 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
+}