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When the definition of an address value is in a different block 

from the user of the address, fall back to just using the
address in a register instead of bailing out of fast-isel
altogether.

llvm-svn: 118917
This commit is contained in:
Dan Gohman 2010-11-12 19:14:00 +00:00
parent 87cf7f787e
commit 0284c5d0c7
1 changed files with 5 additions and 5 deletions
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10
llvm/lib/Target/X86/X86FastISel.cpp
View File

@ -320,11 +320,11 @@ bool X86FastISel::X86SelectAddress(const Value *V, X86AddressMode &AM) {
// Don't walk into other basic blocks; it's possible we haven't
// visited them yet, so the instructions may not yet be assigned
// virtual registers.
if (FuncInfo.MBBMap[I->getParent()] != FuncInfo.MBB)
return false;
Opcode = I->getOpcode();
U = I;
if (FuncInfo.StaticAllocaMap.count(static_cast<const AllocaInst *>(V)) ||
FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) {
Opcode = I->getOpcode();
U = I;
}
} else if (const ConstantExpr *C = dyn_cast<ConstantExpr>(V)) {
Opcode = C->getOpcode();
U = C;