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Add in the first iteration of support for llvm/clang/lldb to allow variable per address space pointer sizes to be optimized correctly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165726 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Micah Villmow
2012-10-11 17:21:41 +00:00
parent ebba49395c
commit f3840d2c16
40 changed files with 188 additions and 109 deletions
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6
lib/Analysis/CodeMetrics.cpp
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@ -91,14 +91,16 @@ bool llvm::isInstructionFree(const Instruction *I, const DataLayout *TD) {
// which doesn't contain values outside the range of a pointer.
if (isa<IntToPtrInst>(CI) && TD &&
TD->isLegalInteger(Op->getType()->getScalarSizeInBits()) &&
Op->getType()->getScalarSizeInBits() <= TD->getPointerSizeInBits())
Op->getType()->getScalarSizeInBits() <= TD->getPointerSizeInBits(
cast<IntToPtrInst>(CI)->getAddressSpace()))
return true;
// A ptrtoint cast is free so long as the result is large enough to store
// the pointer, and a legal integer type.
if (isa<PtrToIntInst>(CI) && TD &&
TD->isLegalInteger(Op->getType()->getScalarSizeInBits()) &&
Op->getType()->getScalarSizeInBits() >= TD->getPointerSizeInBits())
Op->getType()->getScalarSizeInBits() >= TD->getPointerSizeInBits(
cast<PtrToIntInst>(CI)->getPointerAddressSpace()))
return true;
// trunc to a native type is free (assuming the target has compare and