[llvm-commits] [llvm] r170226 - in /llvm/trunk: lib/Transforms/InstCombine/InstCombineMulDivRem.cpp test/Transforms/InstCombine/fast-math.ll

[Eli Friedman]

On Mon, Dec 17, 2012 at 4:51 PM, Shuxin Yang <shuxin.llvm at gmail.com> wrote:
> In order to optimize that way, I need to create instruction "I = X * A"
> first. (Maybe I need to create a dummy instruction
> to use this instruction as well), then go ahead call SimplifyFMul(). Often
> time, if fails, I have to toss away the instruction
> I just created.

The signature is:

  Value *SimplifyFMulInst(Value *LHS, Value *RHS,
                          FastMathFlags FMF,
                          const DataLayout *TD = 0,
                          const TargetLibraryInfo *TLI = 0,
                          const DominatorTree *DT = 0);

No Instruction* required.

-Eli