[PATCH] Allow constant folding of fma and fmuladd

[hfinkel at anl.gov]

================
Comment at: lib/Analysis/ConstantFolding.cpp:1640
@@ +1639,3 @@
+        default: break;
+#if HAVE_FMA
+        case Intrinsic::fma:
----------------
I'm confused as to why you're doing this? Can't APFloat compute the FMA properly regardless of the host capabilities?

Furthermore, if you do it this way, it looks like the answer might be wrong depending on how the compiler was configured?


http://llvm-reviews.chandlerc.com/D2951