Turn MipsOptimizeMathLibCalls into a target-independent scalar transform

...so that it can be used for z too.  Most of the code is the same.
The only real change is to use TargetTransformInfo to test when a sqrt
instruction is available.

The pass is opt-in because at the moment it only handles sqrt.

llvm-svn: 189097

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp
index 4ad71627bea..0a215aa53c6 100644
--- a/llvm/lib/Analysis/TargetTransformInfo.cpp
+++ b/llvm/lib/Analysis/TargetTransformInfo.cpp
@@ -145,6 +145,10 @@ TargetTransformInfo::getPopcntSupport(unsigned IntTyWidthInBit) const {
   return PrevTTI->getPopcntSupport(IntTyWidthInBit);
 }
 
+bool TargetTransformInfo::haveFastSqrt(Type *Ty) const {
+  return PrevTTI->haveFastSqrt(Ty);
+}
+
 unsigned TargetTransformInfo::getIntImmCost(const APInt &Imm, Type *Ty) const {
   return PrevTTI->getIntImmCost(Imm, Ty);
 }
@@ -505,6 +509,10 @@ struct NoTTI : ImmutablePass, TargetTransformInfo {
     return PSK_Software;
   }
 
+  bool haveFastSqrt(Type *Ty) const {
+    return false;
+  }
+
   unsigned getIntImmCost(const APInt &Imm, Type *Ty) const {
     return 1;
   }