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Fix Regression/CodeGen/X86/inline-asm.ll, a case where inline asm causes 

implement extension of a register.

llvm-svn: 28731
This commit is contained in:
Chris Lattner 2006-06-08 18:22:48 +00:00
parent 1b66dd690c
commit 705948d742
1 changed files with 13 additions and 6 deletions
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19
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -1780,15 +1780,19 @@ SDOperand RegsForValue::getCopyFromRegs(SelectionDAG &DAG,
return DAG.getNode(ISD::BUILD_PAIR, ValueVT, Hi, Val);
}
// Otherwise, if the return value was promoted, truncate it to the
// Otherwise, if the return value was promoted or extended, truncate it to the
// appropriate type.
if (RegVT == ValueVT)
return Val;
if (MVT::isInteger(RegVT))
return DAG.getNode(ISD::TRUNCATE, ValueVT, Val);
else
if (MVT::isInteger(RegVT)) {
if (ValueVT < RegVT)
return DAG.getNode(ISD::TRUNCATE, ValueVT, Val);
else
return DAG.getNode(ISD::ANY_EXTEND, ValueVT, Val);
} else {
return DAG.getNode(ISD::FP_ROUND, ValueVT, Val);
}
}
/// getCopyToRegs - Emit a series of CopyToReg nodes that copies the
@ -1895,14 +1899,17 @@ GetRegistersForValue(const std::string &ConstrCode,
if (PhysReg.first) {
if (VT == MVT::Other)
ValueVT = *PhysReg.second->vt_begin();
RegVT = VT;
// Get the actual register value type. This is important, because the user
// may have asked for (e.g.) the AX register in i32 type. We need to
// remember that AX is actually i16 to get the right extension.
RegVT = *PhysReg.second->vt_begin();
// This is a explicit reference to a physical register.
Regs.push_back(PhysReg.first);
// If this is an expanded reference, add the rest of the regs to Regs.
if (NumRegs != 1) {
RegVT = *PhysReg.second->vt_begin();
TargetRegisterClass::iterator I = PhysReg.second->begin();
TargetRegisterClass::iterator E = PhysReg.second->end();
for (; *I != PhysReg.first; ++I)