[PATCH] D13994: Optimization for pow(x, n) where n is some constant

[David Majnemer via llvm-commits]

majnemer added inline comments.

================
Comment at: lib/Transforms/Utils/SimplifyLibCalls.cpp:1157
@@ +1156,3 @@
+      for (unsigned Exp = 2; Exp <= PowerOptThreshold; ++Exp) {
+        if (Op2C->isExactlyValue(Exp) || Op2C->isExactlyValue((int)-Exp)) {
+          Value *FMul = getPow(Op1, Exp, B);
----------------
If `Exp` is `72057594037927937`, it will be converted to `72057594037927936.0` when passing it to `isExactlyValue`.  Is that OK?


http://reviews.llvm.org/D13994