Fix PR618 and Regression/CodeGen/CBackend/2005-08-23-Fmod.ll by not emitting
x%y for 'rem' on fp values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22984 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index fc87afd..df06c7c 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -871,6 +871,9 @@
}
// Function declarations
+ Out << "double fmod(double, double);\n"; // Support for FP rem
+ Out << "float fmodf(float, float);\n";
+
if (!M.empty()) {
Out << "\n/* Function Declarations */\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
@@ -1349,6 +1352,17 @@
Out << "-(";
writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
Out << ")";
+ } else if (I.getOpcode() == Instruction::Rem &&
+ I.getType()->isFloatingPoint()) {
+ // Output a call to fmod/fmodf instead of emitting a%b
+ if (I.getType() == Type::FloatTy)
+ Out << "fmodf(";
+ else
+ Out << "fmod(";
+ writeOperand(I.getOperand(0));
+ Out << ", ";
+ writeOperand(I.getOperand(1));
+ Out << ")";
} else {
writeOperand(I.getOperand(0));