[InstCombine] Missed optimization in math expression: sin(x) / cos(x) => tan(x)
Summary: This patch enables folding sin(x) / cos(x) -> tan(x), cos(x) / sin(x) -> 1 / tan(x) under -ffast-math flag
Reviewers: hfinkel, spatel
Reviewed By: spatel
Subscribers: andrew.w.kaylor, efriedma, scanon, llvm-commits
Differential Revision: https://reviews.llvm.org/D41286
llvm-svn: 322255
diff --git a/llvm/lib/Transforms/Utils/BuildLibCalls.cpp b/llvm/lib/Transforms/Utils/BuildLibCalls.cpp
index b60dfb4..d4cf03c 100644
--- a/llvm/lib/Transforms/Utils/BuildLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -709,6 +709,19 @@
}
}
+bool llvm::hasUnaryFloatFn(const TargetLibraryInfo *TLI, Type *Ty,
+ LibFunc DoubleFn, LibFunc FloatFn,
+ LibFunc LongDoubleFn) {
+ switch (Ty->getTypeID()) {
+ case Type::FloatTyID:
+ return TLI->has(FloatFn);
+ case Type::DoubleTyID:
+ return TLI->has(DoubleFn);
+ default:
+ return TLI->has(LongDoubleFn);
+ }
+}
+
//- Emit LibCalls ------------------------------------------------------------//
Value *llvm::castToCStr(Value *V, IRBuilder<> &B) {