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[ms-inline asm] Compute the inputs and outputs. No test case (yet) as this 

requires codegen support.

llvm-svn: 162410
This commit is contained in:
Chad Rosier 2012-08-22 23:42:09 +00:00
parent d7b66968f9
commit f4958d1f10
1 changed files with 28 additions and 1 deletions
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29
clang/lib/Sema/SemaStmtAsm.cpp
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@ -24,6 +24,7 @@
#include "llvm/ADT/SmallString.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrInfo.h"
@ -31,6 +32,7 @@
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
@ -328,6 +330,19 @@ static bool isMSAsmKeyword(StringRef Name) {
return Ret;
}
// getIdentifierInfo - Given a Name and a range of tokens, find the associated
// IdentifierInfo*.
static IdentifierInfo *getIdentifierInfo(StringRef Name,
ArrayRef<Token> AsmToks,
unsigned Begin, unsigned End) {
for (unsigned i = Begin; i <= End; ++i) {
IdentifierInfo *II = AsmToks[i].getIdentifierInfo();
if (II && II->getName() == Name)
return II;
}
return 0;
}
// getSpelling - Get the spelling of the AsmTok token.
static StringRef getSpelling(Sema &SemaRef, Token AsmTok) {
StringRef Asm;
@ -545,7 +560,7 @@ StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc,
llvm::MCInstPrinter *IP =
TheTarget->createMCInstPrinter(1, *MAI, *MII, *MRI, *STI);
// Build the list of clobbers.
// Build the list of clobbers, outputs and inputs.
unsigned NumDefs = Desc.getNumDefs();
for (unsigned j = 0, e = Inst.getNumOperands(); j != e; ++j) {
const llvm::MCOperand &Op = Inst.getOperand(j);
@ -567,6 +582,18 @@ StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc,
return StmtError(Diag(AsmLoc, diag::err_asm_unknown_register_name) <<
Clobber);
ClobberRegs.insert(Reg);
continue;
}
// Expr/Input or Output.
if (Op.isExpr()) {
const llvm::MCExpr *Expr = Op.getExpr();
const llvm::MCSymbolRefExpr *SymRef;
if ((SymRef = dyn_cast<llvm::MCSymbolRefExpr>(Expr))) {
StringRef Name = SymRef->getSymbol().getName();
IdentifierInfo *II = getIdentifierInfo(Name, AsmToks, AsmTokRanges[i].first, AsmTokRanges[i].second);
if (II)
isDef ? Outputs.push_back(II) : Inputs.push_back(II);
}
}
}
}