[llvm-commits] [llvm] r53356 - in /llvm/branches/Apple/Gaz: lib/Transforms/Scalar/InstructionCombining.cpp test/Transforms/InstCombine/2008-07-08-SubAnd.ll
Bill Wendling
isanbard at gmail.com
Wed Jul 9 14:00:41 PDT 2008
Author: void
Date: Wed Jul 9 16:00:40 2008
New Revision: 53356
URL: http://llvm.org/viewvc/llvm-project?rev=53356&view=rev
Log:
Reverting r53271 from Gaz branch
Modified:
llvm/branches/Apple/Gaz/lib/Transforms/Scalar/InstructionCombining.cpp
llvm/branches/Apple/Gaz/test/Transforms/InstCombine/2008-07-08-SubAnd.ll
Modified: llvm/branches/Apple/Gaz/lib/Transforms/Scalar/InstructionCombining.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Gaz/lib/Transforms/Scalar/InstructionCombining.cpp?rev=53356&r1=53355&r2=53356&view=diff
==============================================================================
--- llvm/branches/Apple/Gaz/lib/Transforms/Scalar/InstructionCombining.cpp (original)
+++ llvm/branches/Apple/Gaz/lib/Transforms/Scalar/InstructionCombining.cpp Wed Jul 9 16:00:40 2008
@@ -3461,17 +3461,6 @@
// ((A ^ N) - B) & AndRHS -> (A - B) & AndRHS iff N&AndRHS == 0
if (Value *V = FoldLogicalPlusAnd(Op0LHS, Op0RHS, AndRHS, true, I))
return BinaryOperator::CreateAnd(V, AndRHS);
-
- // (A - N) & AndRHS -> -N & AndRHS where A & AndRHS == 0
- if (Op0I->hasOneUse() && MaskedValueIsZero(Op0LHS, AndRHSMask)) {
- ConstantInt *A = dyn_cast<ConstantInt>(Op0LHS);
- if (!A || !A->isZero()) {
- Instruction *NewNeg = BinaryOperator::CreateNeg(Op0RHS);
- InsertNewInstBefore(NewNeg, I);
- return BinaryOperator::CreateAnd(NewNeg, AndRHS);
- }
- }
-
break;
case Instruction::Shl:
@@ -3819,7 +3808,7 @@
}
}
}
-
+
return Changed ? &I : 0;
}
Modified: llvm/branches/Apple/Gaz/test/Transforms/InstCombine/2008-07-08-SubAnd.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Gaz/test/Transforms/InstCombine/2008-07-08-SubAnd.ll?rev=53356&r1=53355&r2=53356&view=diff
==============================================================================
--- llvm/branches/Apple/Gaz/test/Transforms/InstCombine/2008-07-08-SubAnd.ll (original)
+++ llvm/branches/Apple/Gaz/test/Transforms/InstCombine/2008-07-08-SubAnd.ll Wed Jul 9 16:00:40 2008
@@ -1,9 +0,0 @@
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep -v {i32 8}
-; PR2330
-
-define i32 @a(i32 %a) nounwind {
-entry:
- %tmp2 = sub i32 8, %a ; <i32> [#uses=1]
- %tmp3 = and i32 %tmp2, 7 ; <i32> [#uses=1]
- ret i32 %tmp3
-}
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