[ppc] vec_sel variants missing

[llvmbot]

Bugzilla Link	46770
Resolution	FIXED
Resolved on	Jan 11, 2021 18:06
Version	trunk
OS	All
Reporter	LLVM Bugzilla Contributor
CC	@ecnelises,@nemanjai

Extended Description

According to the xlc documentation (https://www.ibm.com/support/knowledgecenter/SSXVZZ_16.1.1/com.ibm.compilers.linux.doc/compiler.pdf?view=kc, page 501), the following variants of vec_sel should be available:

vector bool long long
vec_sel(vector bool long long
vector bool long long,
vector bool long long);

vector bool long long
vec_sel(vector bool long long
vector bool long long,
vector unsigned long long);

vector signed long long
vec_sel(vector signed long long
vector signed long long,
vector bool long long);

vector signed long long
vec_sel(vector signed long long
vector signed long long,
vector unsigned long long);

vector unsigned long long
vec_sel(vector unsigned long long
vector unsigned long long,
vector bool long long);

vector unsigned long long
vec_sel(vector unsigned long long
vector unsigned long long,
vector unsigned long long);

However, in clang the only variants declared in altivec.h for 64-bit types have vector double for the first two arguments and the return value.

Reproducing is pretty straightforward, just enable -Wvector-conversion and try to call one of the functions. For example:

#include <altivec.h>

vector signed long long
foo(vector signed long long a,
vector signed long long b,
vector unsigned long long c) {
return vec_sel(a, b, c);
}

Here it is on Compiler Explorer: https://godbolt.org/z/x71Gnj

[llvmbot]

Fixed by https://reviews.llvm.org/D94162