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857a305024
More preparation for dropping source types from MachineInstrs: regsters coming out of already-selected code (i.e. non-generic instructions) don't have a type, but that information is needed so we must add it manually. This is done via a new G_TYPE instruction. llvm-svn: 280292
41 lines
1.5 KiB
C++
41 lines
1.5 KiB
C++
//===-- lib/CodeGen/GlobalISel/CallLowering.cpp - Call lowering -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file implements some simple delegations needed for call lowering.
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///
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/GlobalISel/CallLowering.h"
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#include "llvm/CodeGen/MachineOperand.h"
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#include "llvm/IR/Instructions.h"
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using namespace llvm;
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bool CallLowering::lowerCall(
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MachineIRBuilder &MIRBuilder, const CallInst &CI, unsigned ResReg,
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ArrayRef<unsigned> ArgRegs, std::function<unsigned()> GetCalleeReg) const {
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// First step is to marshall all the function's parameters into the correct
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// physregs and memory locations. Gather the sequence of argument types that
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// we'll pass to the assigner function.
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SmallVector<Type *, 8> ArgTys;
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for (auto &Arg : CI.arg_operands())
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ArgTys.push_back(Arg->getType());
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MachineOperand Callee = MachineOperand::CreateImm(0);
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if (Function *F = CI.getCalledFunction())
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Callee = MachineOperand::CreateGA(F, 0);
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else
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Callee = MachineOperand::CreateReg(GetCalleeReg(), false);
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return lowerCall(MIRBuilder, Callee, CI.getType(),
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ResReg ? ResReg : ArrayRef<unsigned>(), ArgTys, ArgRegs);
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}
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