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CodeGenPrepare: Don't match addressing modes through addrspacecast

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This was resulting in the addrspacecast being removed and incorrectly
replaced with a ptrtoint when sinking.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238217 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault
2015-05-26 16:59:43 +00:00
parent 013041ad5c
commit a0dd2b4df8
2 changed files with 57 additions and 1 deletions
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9
lib/CodeGen/CodeGenPrepare.cpp
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@@ -2672,7 +2672,6 @@ bool AddressingModeMatcher::MatchOperationAddr(User *AddrInst, unsigned Opcode,
return MatchAddr(AddrInst->getOperand(0), Depth);
return false;
case Instruction::BitCast:
case Instruction::AddrSpaceCast:
// BitCast is always a noop, and we can handle it as long as it is
// int->int or pointer->pointer (we don't want int<->fp or something).
if ((AddrInst->getOperand(0)->getType()->isPointerTy() ||
@@ -2683,6 +2682,14 @@ bool AddressingModeMatcher::MatchOperationAddr(User *AddrInst, unsigned Opcode,
AddrInst->getOperand(0)->getType() != AddrInst->getType())
return MatchAddr(AddrInst->getOperand(0), Depth);
return false;
case Instruction::AddrSpaceCast: {
unsigned SrcAS
= AddrInst->getOperand(0)->getType()->getPointerAddressSpace();
unsigned DestAS = AddrInst->getType()->getPointerAddressSpace();
if (TLI.isNoopAddrSpaceCast(SrcAS, DestAS))
return MatchAddr(AddrInst->getOperand(0), Depth);
return false;
}
case Instruction::Add: {
// Check to see if we can merge in the RHS then the LHS. If so, we win.
ExtAddrMode BackupAddrMode = AddrMode;