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MIR Serialization: Start serializing the CFI operands with .cfi_def_cfa_offset.

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This commit begins serialization of the CFI index machine operands by
serializing one kind of CFI instruction - the .cfi_def_cfa_offset instruction.

Reviewers: Duncan P. N. Exon Smith


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242845 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alex Lorenz
2015-07-21 22:28:27 +00:00
parent f17fb8d947
commit 1b75dd2bc2
7 changed files with 145 additions and 1 deletions
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28
lib/CodeGen/MIRParser/MIParser.cpp
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@ -20,6 +20,7 @@
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/raw_ostream.h"
@ -111,6 +112,8 @@ public:
bool parseConstantPoolIndexOperand(MachineOperand &Dest);
bool parseJumpTableIndexOperand(MachineOperand &Dest);
bool parseExternalSymbolOperand(MachineOperand &Dest);
bool parseCFIOffset(int &Offset);
bool parseCFIOperand(MachineOperand &Dest);
bool parseMachineOperand(MachineOperand &Dest);
private:
@ -572,6 +575,29 @@ bool MIParser::parseExternalSymbolOperand(MachineOperand &Dest) {
return false;
}
bool MIParser::parseCFIOffset(int &Offset) {
if (Token.isNot(MIToken::IntegerLiteral))
return error("expected a cfi offset");
if (Token.integerValue().getMinSignedBits() > 32)
return error("expected a 32 bit integer (the cfi offset is too large)");
Offset = (int)Token.integerValue().getExtValue();
lex();
return false;
}
bool MIParser::parseCFIOperand(MachineOperand &Dest) {
// TODO: Parse the other CFI operands.
assert(Token.is(MIToken::kw_cfi_def_cfa_offset));
lex();
int Offset;
if (parseCFIOffset(Offset))
return true;
// NB: MCCFIInstruction::createDefCfaOffset negates the offset.
Dest = MachineOperand::CreateCFIIndex(MF.getMMI().addFrameInst(
MCCFIInstruction::createDefCfaOffset(nullptr, -Offset)));
return false;
}
bool MIParser::parseMachineOperand(MachineOperand &Dest) {
switch (Token.kind()) {
case MIToken::kw_implicit:
@ -602,6 +628,8 @@ bool MIParser::parseMachineOperand(MachineOperand &Dest) {
case MIToken::ExternalSymbol:
case MIToken::QuotedExternalSymbol:
return parseExternalSymbolOperand(Dest);
case MIToken::kw_cfi_def_cfa_offset:
return parseCFIOperand(Dest);
case MIToken::Error:
return true;
case MIToken::Identifier: