[SimplifyLibCalls] Emit sqrt intrinsic instead of a libcall.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277972 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Utils/SimplifyLibCalls.cpp b/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 5e648db..a958eee 100644 (file)
--- a/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -1052,8 +1052,9 @@ Value *LibCallSimplifier::optimizePow(CallInst *CI, IRBuilder<> &B) {
     if (CI->hasUnsafeAlgebra()) {
       IRBuilder<>::FastMathFlagGuard Guard(B);
       B.setFastMathFlags(CI->getFastMathFlags());
-      return emitUnaryFloatFnCall(Op1, TLI->getName(LibFunc::sqrt), B,
-                                  Callee->getAttributes());
+      Value *Sqrt = Intrinsic::getDeclaration(CI->getModule(), Intrinsic::sqrt,
+                                              Op1->getType());
+      return B.CreateCall(Sqrt, Op1, "sqrt");
     }
 
     // Expand pow(x, 0.5) to (x == -infinity ? +infinity : fabs(sqrt(x))).

diff --git a/test/Transforms/InstCombine/pow-sqrt.ll b/test/Transforms/InstCombine/pow-sqrt.ll
index 1e6166c..27d804d 100644 (file)
--- a/test/Transforms/InstCombine/pow-sqrt.ll
+++ b/test/Transforms/InstCombine/pow-sqrt.ll
@@ -6,7 +6,7 @@ define double @pow_half(double %x) {
 }
 
 ; CHECK-LABEL: define double @pow_half(
-; CHECK-NEXT:  %sqrt = call fast double @sqrt(double %x)
+; CHECK-NEXT:  %sqrt = call fast double @llvm.sqrt.f64(double %x)
 ; CHECK-NEXT:  ret double %sqrt
 
 declare double @llvm.pow.f64(double, double)