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Iterate deterministicaly over ClassInfo*'s

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Fixes an observed instance of nondeterministic TableGen output.

Review by Jakob.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164191 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sean Silva 2012-09-19 01:47:03 +00:00
parent decfdf548b
commit b2df610b44
1 changed files with 12 additions and 2 deletions
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14
utils/TableGen/AsmMatcherEmitter.cpp
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@ -279,6 +279,15 @@ public:
}
};
namespace {
/// Sort ClassInfo pointers independently of pointer value.
struct LessClassInfoPtr {
bool operator()(const ClassInfo *LHS, const ClassInfo *RHS) const {
return *LHS < *RHS;
}
};
}
/// MatchableInfo - Helper class for storing the necessary information for an
/// instruction or alias which is capable of being matched.
struct MatchableInfo {
@ -1240,7 +1249,8 @@ void AsmMatcherInfo::buildOperandMatchInfo() {
/// Map containing a mask with all operands indices that can be found for
/// that class inside a instruction.
std::map<ClassInfo*, unsigned> OpClassMask;
typedef std::map<ClassInfo*, unsigned, LessClassInfoPtr> OpClassMaskTy;
OpClassMaskTy OpClassMask;
for (std::vector<MatchableInfo*>::const_iterator it =
Matchables.begin(), ie = Matchables.end();
@ -1259,7 +1269,7 @@ void AsmMatcherInfo::buildOperandMatchInfo() {
}
// Generate operand match info for each mnemonic/operand class pair.
for (std::map<ClassInfo*, unsigned>::iterator iit = OpClassMask.begin(),
for (OpClassMaskTy::iterator iit = OpClassMask.begin(),
iie = OpClassMask.end(); iit != iie; ++iit) {
unsigned OpMask = iit->second;
ClassInfo *CI = iit->first;