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Fix SimplifyLibCalls to transfer attributes from callees rather than

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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
This commit is contained in:
Dan Gohman 2009-09-26 18:10:13 +00:00
parent c70c37794f
commit 76926b6789
2 changed files with 13 additions and 10 deletions
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11
lib/Transforms/Scalar/SimplifyLibCalls.cpp
View File

@ -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));
}
};

12
test/Transforms/SimplifyLibCalls/pow-to-sqrt.ll
View File

@ -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
}