[llvm-commits] CVS: llvm/lib/Transforms/Utils/Local.cpp

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Utils:

Local.cpp updated: 1.23 -> 1.24

---
Log message:

Implement constant folding of fmod, which is used a lot in povray


---
Diffs of the changes:  (+9 -2)

Index: llvm/lib/Transforms/Utils/Local.cpp
diff -u llvm/lib/Transforms/Utils/Local.cpp:1.23 llvm/lib/Transforms/Utils/Local.cpp:1.24
--- llvm/lib/Transforms/Utils/Local.cpp:1.23	Thu May 27 01:26:28 2004
+++ llvm/lib/Transforms/Utils/Local.cpp	Thu May 27 02:25:00 2004
@@ -236,7 +236,7 @@
   const std::string &Name = F->getName();
   return Name == "sin" || Name == "cos" || Name == "tan" || Name == "sqrt" ||
          Name == "log" || Name == "log10" || Name == "exp" || Name == "pow" ||
-         Name == "acos" || Name == "asin";
+         Name == "acos" || Name == "asin" || Name == "atan" || Name == "fmod";
 }
 
 static Constant *ConstantFoldFP(double (*NativeFP)(double), double V,
@@ -282,9 +282,16 @@
   } else if (Operands.size() == 2) {
     if (ConstantFP *Op1 = dyn_cast<ConstantFP>(Operands[0]))
       if (ConstantFP *Op2 = dyn_cast<ConstantFP>(Operands[1])) {
+        double Op1V = Op1->getValue(), Op2V = Op2->getValue();
+
         if (Name == "pow") {
           errno = 0;
-          double V = pow(Op1->getValue(), Op2->getValue());
+          double V = pow(Op1V, Op2V);
+          if (errno == 0)
+            return ConstantFP::get(Ty, V);
+        } else if (Name == "fmod") {
+          errno = 0;
+          double V = fmod(Op1V, Op2V);
           if (errno == 0)
             return ConstantFP::get(Ty, V);
         }