Displaying 4 results from an estimated 4 matches for "setunavailable".
2016 Jun 14
2
llvm intrinsics/libc/libm question
If I do
T.getArch() == xxx
TLI.setUnavailable(LibFunc::copysign)
then this works at generating a call instead of not being able to select
the ISD::FCOPYSIGN, but I don't know why I don't need to do this for other
LibFunc functions (such as floor, etc... these generate call just fine)?
Thanks,
Ryan
On Tue, Jun 14, 2016 at 11:58 AM,...
2016 Jun 07
3
llvm intrinsics/libc/libm question
I'm trying to figure out exactly how the intrinsics/libc/libm work in llvm.
For example, this code return user defined function:
float acos(float x, float y)
{
return x+y;
}
float a;
void foo(float b, float c)
{
a = acos(b, c);
}
But this code returns llvm.intrinsic:
float acos(float, float);
float a;
void foo(float b, float c)
{
a = acos(b, c);
}
float acos(float x, float y)
{
2016 Jun 07
3
llvm intrinsics/libc/libm question
...is this possible?
>
> If you're using clang: -fno-builtin=acos is what you're looking for.
>
> If you're using llvm: when setting up your pass pipeline, you should
> create an instance of TargetLibraryInfo (an example is in
> tools/opt/opt.cpp), and either use:
> - setUnavailable(LibFunc::acos): this marks acos as "unavailable",
> preventing optimizations from making assumptions about its behavior.
> Equivalent to clang -fno-builtin-acos
> - disableAllFunctions(): this marks all known functions as
> unavailable. Equivalent to clang -fno-builtin
>
&...
2016 Jun 07
4
llvm intrinsics/libc/libm question
On Tue, Jun 7, 2016 at 1:57 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:
> Tim,
>
> Currently, I have to do multiple things:
>
> 1) create some setLibcallNames in XXXISelLowering.cpp to generate correct
> naming for RTLIBS.
> 2) lower ISD down to an RTLIB for some calls (and then do solution 1 on
> those to get correct names)
These solve a related but different -