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[PowerPC] Fix memory corruption in AsmParser

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As pointed out by Evgeniy Stepanov, assigning a std::string temporary
to a StringRef is not a good idea.  Rework MatchRegisterName to avoid
using the .lower routine.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181192 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ulrich Weigand 2013-05-06 11:16:57 +00:00
parent 5d042c6374
commit 7d55b6bb1a
1 changed files with 7 additions and 7 deletions
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14
lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
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@ -508,29 +508,29 @@ MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
bool PPCAsmParser::
MatchRegisterName(const AsmToken &Tok, unsigned &RegNo, int64_t &IntVal) {
if (Tok.is(AsmToken::Identifier)) {
StringRef Name = Tok.getString().lower();
StringRef Name = Tok.getString();
if (Name == "lr") {
if (Name.equals_lower("lr")) {
RegNo = isPPC64()? PPC::LR8 : PPC::LR;
IntVal = 8;
return false;
} else if (Name == "ctr") {
} else if (Name.equals_lower("ctr")) {
RegNo = isPPC64()? PPC::CTR8 : PPC::CTR;
IntVal = 9;
return false;
} else if (Name.startswith("r") &&
} else if (Name.substr(0, 1).equals_lower("r") &&
!Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
RegNo = isPPC64()? XRegs[IntVal] : RRegs[IntVal];
return false;
} else if (Name.startswith("f") &&
} else if (Name.substr(0, 1).equals_lower("f") &&
!Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
RegNo = FRegs[IntVal];
return false;
} else if (Name.startswith("v") &&
} else if (Name.substr(0, 1).equals_lower("v") &&
!Name.substr(1).getAsInteger(10, IntVal) && IntVal < 32) {
RegNo = VRegs[IntVal];
return false;
} else if (Name.startswith("cr") &&
} else if (Name.substr(0, 2).equals_lower("cr") &&
!Name.substr(2).getAsInteger(10, IntVal) && IntVal < 8) {
RegNo = CRRegs[IntVal];
return false;