[llvm-commits] CVS: llvm/lib/Transforms/Scalar/InstructionCombining.cpp
Chris Lattner
lattner at cs.uiuc.edu
Tue Oct 26 22:57:29 PDT 2004
Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.276 -> 1.277
---
Log message:
Hrm, this code was severely botched. As it turns out, this patch:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20041018/019708.html
exposed ANOTHER latent bug in this xform, which caused Prolangs-C/bison to fill
the zion nightly tester disk up and make the tester barf.
This is obviously not a good thing, so lets fix this bug shall we? :)
---
Diffs of the changes: (+4 -0)
Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp
diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.276 llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.277
--- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.276 Thu Oct 21 23:53:16 2004
+++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Wed Oct 27 00:57:15 2004
@@ -1294,6 +1294,10 @@
ShVal = InsertNewInstBefore(new ShiftInst(Instruction::Shr, ShVal,
OpRHS, Op->getName()),
TheAnd);
+ Value *AndRHS2 = ConstantExpr::getCast(AndRHS, ShVal->getType());
+ ShVal = InsertNewInstBefore(BinaryOperator::createAnd(ShVal, AndRHS2,
+ TheAnd.getName()),
+ TheAnd);
return new CastInst(ShVal, Op->getType());
}
}
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