From: Davide Italiano <davide@freebsd.org>
Date: Mon, 8 Aug 2016 03:23:01 +0000 (+0000)
Subject: [SimplifyLibCalls] Emit sqrt intrinsic instead of a libcall.
X-Git-Tag: llvmorg-4.0.0-rc1~13096
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e3b916d1649de6689034aa1dcf9ceaeba4db72dc;p=platform%2Fupstream%2Fllvm.git

[SimplifyLibCalls] Emit sqrt intrinsic instead of a libcall.

llvm-svn: 277972
---

diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 5e648db..a958eee 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/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/llvm/test/Transforms/InstCombine/pow-sqrt.ll b/llvm/test/Transforms/InstCombine/pow-sqrt.ll
index 1e6166c..27d804d 100644
--- a/llvm/test/Transforms/InstCombine/pow-sqrt.ll
+++ b/llvm/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)