Follow-up fix to r165928: handle memset rewriting for widened integers,

[oota-llvm.git] / lib / Transforms / InstCombine / InstCombineSimplifyDemanded.cpp

diff --git a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
index 9857f6ab5a252da6495ba6ce9dd81035e1fdd8f0..602b20337144e4ed32cc4e2ec680458e67e3939d 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
+++ b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
@@ -14,7 +14,7 @@
 
 
 #include "InstCombine.h"
-#include "llvm/Target/TargetData.h"
+#include "llvm/DataLayout.h"
 #include "llvm/IntrinsicInst.h"
 
 using namespace llvm;
@@ -304,7 +304,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
     
     // If all of the demanded bits are known to be zero on one side or the
     // other, turn this into an *inclusive* or.
-    //    e.g. (A & C1)^(B & C2) -> (A & C1)|(B & C2) if C1&C2 == 0
+    //    e.g. (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
     if ((DemandedMask & ~RHSKnownZero & ~LHSKnownZero) == 0) {
       Instruction *Or = 
         BinaryOperator::CreateOr(I->getOperand(0), I->getOperand(1),
@@ -315,7 +315,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
     // If all of the demanded bits on one side are known, and all of the set
     // bits on that side are also known to be set on the other side, turn this
     // into an AND, as we know the bits will be cleared.
-    //    e.g. (X | C1) ^ C2 --> (X | C1) & ~C2 if (C1&C2) == C2
+    //    e.g. (X | C1) ^ C2 --> (X | C1) & ~C2 iff (C1&C2) == C2
     if ((DemandedMask & (RHSKnownZero|RHSKnownOne)) == DemandedMask) { 
       // all known
       if ((RHSKnownOne & LHSKnownOne) == RHSKnownOne) {