Fix SimplifyLibCalls to transfer attributes from callees rather than

calls, since direct calls don't always reflect the attributes of their
callees.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82867 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 13 insertions, 10 deletions

diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index bb4d5e250b..57a7d051e9 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -1019,7 +1019,7 @@ struct PowOpt : public LibCallOptimization {
       if (Op1C->isExactlyValue(1.0))  // pow(1.0, x) -> 1.0
         return Op1C;
       if (Op1C->isExactlyValue(2.0))  // pow(2.0, x) -> exp2(x)
-        return EmitUnaryFloatFnCall(Op2, "exp2", B, CI->getAttributes());
+        return EmitUnaryFloatFnCall(Op2, "exp2", B, Callee->getAttributes());
     }
     
     ConstantFP *Op2C = dyn_cast<ConstantFP>(Op2);
@@ -1036,8 +1036,10 @@ struct PowOpt : public LibCallOptimization {
       // TODO: In finite-only mode, this could be just fabs(sqrt(x)).
       Value *Inf = ConstantFP::getInfinity(CI->getType());
       Value *NegInf = ConstantFP::getInfinity(CI->getType(), true);
-      Value *Sqrt = EmitUnaryFloatFnCall(Op1, "sqrt", B, CI->getAttributes());
-      Value *FAbs = EmitUnaryFloatFnCall(Sqrt, "fabs", B, CI->getAttributes());
+      Value *Sqrt = EmitUnaryFloatFnCall(Op1, "sqrt", B,
+                                         Callee->getAttributes());
+      Value *FAbs = EmitUnaryFloatFnCall(Sqrt, "fabs", B,
+                                         Callee->getAttributes());
       Value *FCmp = B.CreateFCmpOEQ(Op1, NegInf, "tmp");
       Value *Sel = B.CreateSelect(FCmp, Inf, FAbs, "tmp");
       return Sel;
@@ -1121,7 +1123,8 @@ struct UnaryDoubleFPOpt : public LibCallOptimization {
 
     // floor((double)floatval) -> (double)floorf(floatval)
     Value *V = Cast->getOperand(0);
-    V = EmitUnaryFloatFnCall(V, Callee->getName().data(), B, CI->getAttributes());
+    V = EmitUnaryFloatFnCall(V, Callee->getName().data(), B,
+                             Callee->getAttributes());
     return B.CreateFPExt(V, Type::getDoubleTy(*Context));
   }
 };
diff --git a/test/Transforms/SimplifyLibCalls/pow-to-sqrt.ll b/test/Transforms/SimplifyLibCalls/pow-to-sqrt.ll
index 75e5104d33..669b414531 100644
--- a/test/Transforms/SimplifyLibCalls/pow-to-sqrt.ll
+++ b/test/Transforms/SimplifyLibCalls/pow-to-sqrt.ll
@@ -5,27 +5,27 @@
 ; special cases. The readonly attribute on the call should be preserved.
 
 ; CHECK: define float @foo(float %x) nounwind {
-; CHECK:   %sqrtf = call float @sqrtf(float %x) readonly
-; CHECK:   %fabsf = call float @fabsf(float %sqrtf) readonly
+; CHECK:   %sqrtf = call float @sqrtf(float %x) nounwind readonly
+; CHECK:   %fabsf = call float @fabsf(float %sqrtf) nounwind readonly
 ; CHECK:   %tmp = fcmp oeq float %x, 0xFFF0000000000000
 ; CHECK:   %tmp1 = select i1 %tmp, float 0x7FF0000000000000, float %fabsf
 ; CHECK:   ret float %tmp1
 
 define float @foo(float %x) nounwind {
-  %retval = call float @powf(float %x, float 0.5) readonly
+  %retval = call float @powf(float %x, float 0.5)
   ret float %retval
 }
 
 ; CHECK: define double @doo(double %x) nounwind {
-; CHECK:   %sqrt = call double @sqrt(double %x) readonly
-; CHECK:   %fabs = call double @fabs(double %sqrt) readonly
+; CHECK:   %sqrt = call double @sqrt(double %x) nounwind readonly
+; CHECK:   %fabs = call double @fabs(double %sqrt) nounwind readonly
 ; CHECK:   %tmp = fcmp oeq double %x, 0xFFF0000000000000
 ; CHECK:   %tmp1 = select i1 %tmp, double 0x7FF0000000000000, double %fabs
 ; CHECK:   ret double %tmp1
 ; CHECK: }
 
 define double @doo(double %x) nounwind {
-  %retval = call double @pow(double %x, double 0.5) readonly
+  %retval = call double @pow(double %x, double 0.5)
   ret double %retval
 }