[llvm] [GlobalISel] Propagate fast-math flags when fusing fmul+fadd into fma (PR #215150)

[via llvm-commits]

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@@ -6488,6 +6488,7 @@ bool CombinerHelper::matchCombineFAddFMulToFMadOrFMA(
   if (!canCombineFMadOrFMA(MI, AllowFusionGlobally, HasFMAD, Aggressive))
     return false;
 
+  unsigned Flags = MI.getFlags();
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LU-JOHN wrote:

> Indeed. Thanks!

Are there any tests where the flags between FMUL and FADD are different?  I didn't see any.  

https://github.com/llvm/llvm-project/pull/215150