[ms-inline asm] Have MC start parsing the asms.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161913 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp
index 1c2b6a4..9d130af 100644
--- a/lib/Sema/SemaStmt.cpp
+++ b/lib/Sema/SemaStmt.cpp
@@ -35,6 +35,9 @@
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
@@ -2924,7 +2927,55 @@
Parser->setAssemblerDialect(1);
Parser->setTargetParser(*TargetParser.get());
- // TODO: Start parsing.
+ // Prime the lexer.
+ Parser->Lex();
+
+ // Parse the opcode.
+ StringRef IDVal;
+ Parser->ParseIdentifier(IDVal);
+
+ // Canonicalize the opcode to lower case.
+ SmallString<128> Opcode;
+ for (unsigned i = 0, e = IDVal.size(); i != e; ++i)
+ Opcode.push_back(tolower(IDVal[i]));
+
+ // Parse the operands.
+ llvm::SMLoc IDLoc;
+ SmallVector<llvm::MCParsedAsmOperand*, 8> Operands;
+ bool HadError = TargetParser->ParseInstruction(Opcode.str(), IDLoc,
+ Operands);
+ assert (!HadError && "Unexpected error parsing instruction");
+
+ // Match the MCInstr.
+ SmallVector<llvm::MCInst, 2> Instrs;
+ HadError = TargetParser->MatchInstruction(IDLoc, Operands, Instrs);
+ assert (!HadError && "Unexpected error matching instruction");
+ assert ((Instrs.size() == 1) && "Expected only a single instruction.");
+
+ // Get the instruction descriptor.
+ llvm::MCInst Inst = Instrs[0];
+ const llvm::MCInstrInfo *MII = TheTarget->createMCInstrInfo();
+ const llvm::MCInstrDesc &Desc = MII->get(Inst.getOpcode());
+ llvm::MCInstPrinter *IP =
+ TheTarget->createMCInstPrinter(1, *MAI, *MII, *MRI, *STI);
+
+ // Build the list of clobbers.
+ for (unsigned i = 0, e = Desc.getNumDefs(); i != e; ++i) {
+ const llvm::MCOperand &Op = Inst.getOperand(i);
+ if (!Op.isReg())
+ continue;
+
+ std::string Reg;
+ llvm::raw_string_ostream OS(Reg);
+ IP->printRegName(OS, Op.getReg());
+
+ StringRef Clobber(OS.str());
+ if (!Context.getTargetInfo().isValidClobber(Clobber))
+ return StmtError(Diag(AsmLoc, diag::err_asm_unknown_register_name) <<
+ Clobber);
+ // FIXME: Asm blocks may result in redundant clobbers.
+ Clobbers.push_back(Reg);
+ }
}
MSAsmStmt *NS =
