diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineCompares.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCompares.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCompares.cpp b/lib/Transforms/InstCombine/InstCombineCompares.cpp index bad46b4dab..0267117421 100644 --- a/lib/Transforms/InstCombine/InstCombineCompares.cpp +++ b/lib/Transforms/InstCombine/InstCombineCompares.cpp @@ -1339,7 +1339,12 @@ Instruction *InstCombiner::visitICmpInstWithInstAndIntCst(ICmpInst &ICI, // free on the target. It has the additional benefit of comparing to a // smaller constant, which will be target friendly. unsigned Amt = ShAmt->getLimitedValue(TypeBits-1); - if (Amt != 0 && RHSV.countTrailingZeros() >= Amt) { + // @LOCALMOD-BEGIN + // We don't want to introduce non-power-of-two integer sizes for PNaCl's + // stable wire format, so modify this transformation for NaCl. + if (Amt != 0 && RHSV.countTrailingZeros() >= Amt && + isPowerOf2_32(TypeBits - Amt) && (TypeBits - Amt) >= 8) { + // @LOCALMOD-END Type *NTy = IntegerType::get(ICI.getContext(), TypeBits - Amt); Constant *NCI = ConstantExpr::getTrunc( ConstantExpr::getAShr(RHS, |