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[mips] Fix passing of small structures for big-endian O32.

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Summary:
Like N32/N64, they must be passed in the upper bits of the register.

The new code could be merged with the existing if-statements but I've
refrained from doing this since it will make porting the O32 implementation
to tablegen harder later.

Reviewers: vmedic

Reviewed By: vmedic

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D6463


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223148 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders
2014-12-02 20:40:27 +00:00
parent 2664ea938f
commit d69ec73a46
2 changed files with 57 additions and 0 deletions
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16
lib/Target/Mips/MipsISelLowering.cpp
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@@ -2267,6 +2267,9 @@ SDValue MipsTargetLowering::lowerFP_TO_SINT(SDValue Op,
static bool CC_MipsO32(unsigned ValNo, MVT ValVT, MVT LocVT,
CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
CCState &State, const MCPhysReg *F64Regs) {
const MipsSubtarget &Subtarget =
State.getMachineFunction().getTarget()
.getSubtarget<const MipsSubtarget>();
static const unsigned IntRegsSize = 4, FloatRegsSize = 2;
@@ -2277,6 +2280,19 @@ static bool CC_MipsO32(unsigned ValNo, MVT ValVT, MVT LocVT,
if (ArgFlags.isByVal())
return true;
// Promote i8 and i16
if (ArgFlags.isInReg() && !Subtarget.isLittle()) {
if (LocVT == MVT::i8 || LocVT == MVT::i16 || LocVT == MVT::i32) {
LocVT = MVT::i32;
if (ArgFlags.isSExt())
LocInfo = CCValAssign::SExtUpper;
else if (ArgFlags.isZExt())
LocInfo = CCValAssign::ZExtUpper;
else
LocInfo = CCValAssign::AExtUpper;
}
}
// Promote i8 and i16
if (LocVT == MVT::i8 || LocVT == MVT::i16) {
LocVT = MVT::i32;