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Lift arg promotion from the X86 backend. This should be unified at some point.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116694 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2010-10-18 02:17:53 +00:00
parent 404be0c04f
commit fa87d66752
1 changed files with 57 additions and 3 deletions
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60
lib/Target/ARM/ARMFastISel.cpp
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@ -149,6 +149,8 @@ class ARMFastISel : public FastISel {
// Call handling routines.
private:
bool FastEmitExtend(ISD::NodeType Opc, EVT DstVT, unsigned Src, EVT SrcVT,
unsigned &ResultReg);
CCAssignFn *CCAssignFnForCall(CallingConv::ID CC, bool Return);
bool ProcessCallArgs(SmallVectorImpl<Value*> &Args,
SmallVectorImpl<unsigned> &ArgRegs,
@ -1234,6 +1236,18 @@ bool ARMFastISel::SelectBinaryOp(const Instruction *I, unsigned ISDOpcode) {
// Call Handling Code
bool ARMFastISel::FastEmitExtend(ISD::NodeType Opc, EVT DstVT, unsigned Src,
EVT SrcVT, unsigned &ResultReg) {
unsigned RR = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(), Opc,
Src, /*TODO: Kill=*/false);
if (RR != 0) {
ResultReg = RR;
return true;
} else
return false;
}
// This is largely taken directly from CCAssignFnForNode - we don't support
// varargs in FastISel so that part has been removed.
// TODO: We may not support all of this.
@ -1290,9 +1304,49 @@ bool ARMFastISel::ProcessCallArgs(SmallVectorImpl<Value*> &Args,
// Handle arg promotion, etc.
switch (VA.getLocInfo()) {
case CCValAssign::Full: break;
default:
// TODO: Handle arg promotion.
return false;
case CCValAssign::SExt: {
bool Emitted = FastEmitExtend(ISD::SIGN_EXTEND, VA.getLocVT(),
Arg, ArgVT, Arg);
assert(Emitted && "Failed to emit a sext!"); Emitted=Emitted;
Emitted = true;
ArgVT = VA.getLocVT();
break;
}
case CCValAssign::ZExt: {
bool Emitted = FastEmitExtend(ISD::ZERO_EXTEND, VA.getLocVT(),
Arg, ArgVT, Arg);
assert(Emitted && "Failed to emit a zext!"); Emitted=Emitted;
Emitted = true;
ArgVT = VA.getLocVT();
break;
}
case CCValAssign::AExt: {
// We don't handle NEON or f64 parameters yet.
if (VA.getLocVT().isVector() && VA.getLocVT().getSizeInBits() >= 64)
return false;
bool Emitted = FastEmitExtend(ISD::ANY_EXTEND, VA.getLocVT(),
Arg, ArgVT, Arg);
if (!Emitted)
Emitted = FastEmitExtend(ISD::ZERO_EXTEND, VA.getLocVT(),
Arg, ArgVT, Arg);
if (!Emitted)
Emitted = FastEmitExtend(ISD::SIGN_EXTEND, VA.getLocVT(),
Arg, ArgVT, Arg);
assert(Emitted && "Failed to emit a aext!"); Emitted=Emitted;
ArgVT = VA.getLocVT();
break;
}
case CCValAssign::BCvt: {
unsigned BC = FastEmit_r(ArgVT.getSimpleVT(),
VA.getLocVT().getSimpleVT(),
ISD::BIT_CONVERT, Arg, /*TODO: Kill=*/false);
assert(BC != 0 && "Failed to emit a bitcast!");
Arg = BC;
ArgVT = VA.getLocVT();
break;
}
default: llvm_unreachable("Unknown arg promotion!");
}
// Now copy/store arg to correct locations.