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Fast-math flags for LLVM IR parsing and printing

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Added in the ability to read LLVM IR text that contains fast-math flags as a sequence of capital letters separated by spaces in any order. Added in the printing of the fast-math flags in a canonical order, and don't print the other flags when 'fast' is specified, as 'fast' implies all the others.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168645 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Ilseman
2012-11-27 00:42:44 +00:00
parent 4d26533234
commit 15c13d3e63
5 changed files with 54 additions and 4 deletions
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14
lib/AsmParser/LLParser.cpp
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@ -3012,7 +3012,17 @@ int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
}
case lltok::kw_fadd:
case lltok::kw_fsub:
case lltok::kw_fmul: return ParseArithmetic(Inst, PFS, KeywordVal, 2);
case lltok::kw_fmul:
case lltok::kw_fdiv:
case lltok::kw_frem: {
FastMathFlags FMF = EatFastMathFlagsIfPresent();
int Res = ParseArithmetic(Inst, PFS, KeywordVal, 2);
if (Res != 0)
return Res;
if (FMF.any())
Inst->setFastMathFlags(FMF);
return 0;
}
case lltok::kw_sdiv:
case lltok::kw_udiv:
@ -3027,8 +3037,6 @@ int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
case lltok::kw_urem:
case lltok::kw_srem: return ParseArithmetic(Inst, PFS, KeywordVal, 1);
case lltok::kw_fdiv:
case lltok::kw_frem: return ParseArithmetic(Inst, PFS, KeywordVal, 2);
case lltok::kw_and:
case lltok::kw_or:
case lltok::kw_xor: return ParseLogical(Inst, PFS, KeywordVal);