[llvm] r175759 - DAGCombiner: Make the post-legalize vector op optimization more aggressive.

[Benjamin Kramer]

Author: d0k
Date: Thu Feb 21 09:24:35 2013
New Revision: 175759

URL: http://llvm.org/viewvc/llvm-project?rev=175759&view=rev
Log:
DAGCombiner: Make the post-legalize vector op optimization more aggressive.

A legal BUILD_VECTOR goes in and gets constant folded into another legal
BUILD_VECTOR so we don't lose any legality here. The problematic PPC
optimization that made this check necessary was fixed recently.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    llvm/trunk/test/CodeGen/X86/sse2-blend.ll

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=175759&r1=175758&r2=175759&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Thu Feb 21 09:24:35 2013
@@ -9262,11 +9262,6 @@ SDValue DAGCombiner::XformToShuffleWithZ
 
 /// SimplifyVBinOp - Visit a binary vector operation, like ADD.
 SDValue DAGCombiner::SimplifyVBinOp(SDNode *N) {
-  // After legalize, the target may be depending on adds and other
-  // binary ops to provide legal ways to construct constants or other
-  // things. Simplifying them may result in a loss of legality.
-  if (LegalOperations) return SDValue();
-
   assert(N->getValueType(0).isVector() &&
          "SimplifyVBinOp only works on vectors!");
 
@@ -9336,11 +9331,6 @@ SDValue DAGCombiner::SimplifyVBinOp(SDNo
 
 /// SimplifyVUnaryOp - Visit a binary vector operation, like FABS/FNEG.
 SDValue DAGCombiner::SimplifyVUnaryOp(SDNode *N) {
-  // After legalize, the target may be depending on adds and other
-  // binary ops to provide legal ways to construct constants or other
-  // things. Simplifying them may result in a loss of legality.
-  if (LegalOperations) return SDValue();
-
   assert(N->getValueType(0).isVector() &&
          "SimplifyVUnaryOp only works on vectors!");
 

Modified: llvm/trunk/test/CodeGen/X86/sse2-blend.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/sse2-blend.ll?rev=175759&r1=175758&r2=175759&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/sse2-blend.ll (original)
+++ llvm/trunk/test/CodeGen/X86/sse2-blend.ll Thu Feb 21 09:24:35 2013
@@ -29,7 +29,6 @@ define void at vsel_i32(<4 x i32>* %v1, <4
 ; Without forcing instructions, fall back to the preferred PS domain.
 ; CHECK: vsel_i64
 ; CHECK: andnps
-; CHECK: andps
 ; CHECK: orps
 ; CHECK: ret
 
@@ -44,7 +43,6 @@ define void at vsel_i64(<2 x i64>* %v1, <2
 ; Without forcing instructions, fall back to the preferred PS domain.
 ; CHECK: vsel_double
 ; CHECK: andnps
-; CHECK: andps
 ; CHECK: orps
 ; CHECK: ret