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Do type checks before we bother to do everything else. 

llvm-svn: 112039
This commit is contained in:
Eric Christopher 2010-08-25 08:43:57 +00:00
parent aab3e41eb2
commit 7a0d8c69cb
1 changed files with 9 additions and 8 deletions
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17
llvm/lib/Target/ARM/ARMFastISel.cpp
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@ -415,14 +415,19 @@ bool ARMFastISel::ARMEmitLoad(EVT VT, unsigned &ResultReg,
}
bool ARMFastISel::ARMSelectLoad(const Instruction *I) {
// Our register and offset with innocuous defaults.
unsigned Reg = 0;
int Offset = 0;
// If we're an alloca we know we have a frame index and can emit the load
// directly in short order.
if (ARMLoadAlloca(I))
return true;
// Verify we have a legal type before going any further.
EVT VT;
if (!isTypeLegal(I->getType(), VT))
return false;
// Our register and offset with innocuous defaults.
unsigned Reg = 0;
int Offset = 0;
// See if we can handle this as Reg + Offset
if (!ARMComputeRegOffset(I->getOperand(0), Reg, Offset))
@ -445,10 +450,6 @@ bool ARMFastISel::ARMSelectLoad(const Instruction *I) {
static_cast<const ARMBaseInstrInfo&>(TII));
}
EVT VT;
if (!isTypeLegal(I->getType(), VT))
return false;
unsigned ResultReg;
// TODO: Verify the additions above work, otherwise we'll need to add the
// offset instead of 0 and do all sorts of operand munging.