[Bug target/87767] Missing AVX512 memory broadcast for constant vector

[kretz at kde dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87767

Matthias Kretz <kretz at kde dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kretz at kde dot org

--- Comment #3 from Matthias Kretz <kretz at kde dot org> ---
Here's a link to quickly survey the state of the optimization:
https://godbolt.org/z/P8FFSB

The broadcast contraction generally exists for 32 and 64 bit operands (i.e. 8
and 16 bit integers do not support memory broadcasts).

Note that I also added 8 Byte vectors of float and int into my test case. Those
should also use the {1to4} broadcast.

Test case (C++14):
auto f(float a [[gnu::vector_size(64)]]) {
    return a OP 101;
}
auto f(float a [[gnu::vector_size(32)]]) {
    return a OP 101;
}
auto f(float a [[gnu::vector_size(16)]]) {
    return a OP 101;
}
auto f(float a [[gnu::vector_size(8)]]) {
    return a OP 101;
}
auto f(double a [[gnu::vector_size(64)]]) {
    return a OP 101;
}
auto f(double a [[gnu::vector_size(32)]]) {
    return a OP 101;
}
auto f(double a [[gnu::vector_size(16)]]) {
    return a OP 101;
}
auto f(int a [[gnu::vector_size(64)]]) {
    return a OP 101;
}
auto f(int a [[gnu::vector_size(32)]]) {
    return a OP 101;
}
auto f(int a [[gnu::vector_size(16)]]) {
    return a OP 101;
}
auto f(int a [[gnu::vector_size(8)]]) {
    return a OP 101;
}
auto f(long long a [[gnu::vector_size(64)]]) {
    return a OP 101;
}
auto f(long long a [[gnu::vector_size(32)]]) {
    return a OP 101;
}
auto f(long long a [[gnu::vector_size(16)]]) {
    return a OP 101;
}