q66 added a comment.
and indeed, it affects semantics too:
/tmp$ clang++ test.cc -o test -faltivec-src-compat=xl
/tmp$ ./test
b
b
b
/tmp$ clang++ test.cc -o test -faltivec-src-compat=gcc
/tmp$ ./test
Dv4_i
Dv4_i
Dv8_s
/tmp$ clang++ test.cc -o test -faltivec-src-compat=mixed
test.cc:10:20: warning: Current handling of vector bool and vector pixel
types in this context are deprecated. The default behaviour will soon change to
that implied by the '-altivec-compat=xl' option
[-Wdeprecated-altivec-src-compat]
auto cmp = (v1 == v2);
^
test.cc:12:22: warning: Current handling of vector bool and vector pixel
types in this context are deprecated. The default behaviour will soon change to
that implied by the '-altivec-compat=xl' option
[-Wdeprecated-altivec-src-compat]
auto pcmp = (pv1 == pv2);
^
2 warnings generated.
/tmp$ ./test
Dv4_i
b
Dv8_s
/tmp$ cat test.cc
#include <typeinfo>
#include <cstdio>
typedef float simd4f __attribute__((vector_size(16)));
int main() {
simd4f v1, v2;
vector float fv1, fv2;
vector pixel pv1, pv2;
auto cmp = (v1 == v2);
auto acmp = (fv1 == fv2);
auto pcmp = (pv1 == pv2);
printf("%s\n", typeid(cmp).name());
printf("%s\n", typeid(acmp).name());
printf("%s\n", typeid(pcmp).name());
}
Repository:
rG LLVM Github Monorepo
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https://reviews.llvm.org/D106120/new/
https://reviews.llvm.org/D106120
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