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author | Chris Lattner <sabre@nondot.org> | 2004-07-21 04:27:24 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2004-07-21 04:27:24 +0000 |
commit | e8a7e593e6caf0d9ecaac24033bc886081949181 (patch) | |
tree | ce14814737782ebd745642124485f46fc4eb4ee9 /lib/Transforms | |
parent | bb8f43c8fcac4688f25c6d3a46651a0b1893eb03 (diff) | |
download | llvm-e8a7e593e6caf0d9ecaac24033bc886081949181.tar.gz llvm-e8a7e593e6caf0d9ecaac24033bc886081949181.tar.bz2 llvm-e8a7e593e6caf0d9ecaac24033bc886081949181.tar.xz |
Remove special casing of pointers and treat them generically as integers of
the appopriate size. This gives us the ability to eliminate int -> ptr -> int
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15063 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
-rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 376222ffe2..4634b6d9c4 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -1974,14 +1974,11 @@ static inline bool isEliminableCastOfCast(const Type *SrcTy, const Type *MidTy, if (SrcTy == DstTy && SrcTy->isLosslesslyConvertibleTo(MidTy)) return true; - // If the source and destination types are pointer types, and the intermediate - // is an integer type bigger than a pointer, eliminate the casts. - if (isa<PointerType>(SrcTy) && isa<PointerType>(DstTy)) { - if (isa<PointerType>(MidTy)) return true; - - if (MidTy->isInteger() && MidTy->getPrimitiveSize() >= TD->getPointerSize()) - return true; - } + // If we are casting between pointer and integer types, treat pointers as + // integers of the appropriate size for the code below. + if (isa<PointerType>(SrcTy)) SrcTy = TD->getIntPtrType(); + if (isa<PointerType>(MidTy)) MidTy = TD->getIntPtrType(); + if (isa<PointerType>(DstTy)) DstTy = TD->getIntPtrType(); // Allow free casting and conversion of sizes as long as the sign doesn't // change... |