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| author | Kewen Lin <linkw@linux.ibm.com> | 2021-11-28 19:59:59 -0600 |
|---|---|---|
| committer | Kewen Lin <linkw@linux.ibm.com> | 2021-11-28 19:59:59 -0600 |
| commit | 300dbea12693e365c89971527ca14cb0242def64 (patch) | |
| tree | e63cc02d5be7635d07df83bc936919071eb7b7cf | |
| parent | 68332ab7ec58a89660db82569c5f4c2251d59741 (diff) | |
| download | gcc-300dbea12693e365c89971527ca14cb0242def64.zip gcc-300dbea12693e365c89971527ca14cb0242def64.tar.gz gcc-300dbea12693e365c89971527ca14cb0242def64.tar.bz2 | |
rs6000/test: Add emulated gather test case
As verified, the emulated gather capability of vectorizer
(r12-2733) can help to speed up SPEC2017 510.parest_r on
Power8/9/10 by 5% ~ 9% with option sets Ofast unroll and
Ofast lto.
This patch is to add a test case similar to the one in i386
to add testing coverage for 510.parest_r hotspots.
btw, different from the one in i386, this uses unsigned int
as INDEXTYPE since the unpack support for unsigned int
(r12-3134) also matters for the hotspots vectorization.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/vect-gather-1.c: New test.
| -rw-r--r-- | gcc/testsuite/gcc.target/powerpc/vect-gather-1.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/powerpc/vect-gather-1.c b/gcc/testsuite/gcc.target/powerpc/vect-gather-1.c new file mode 100644 index 0000000..bf98045 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/vect-gather-1.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* Profitable from Power8 since it supports efficient unaligned load. */ +/* { dg-options "-Ofast -mdejagnu-cpu=power8 -fdump-tree-vect-details -fdump-tree-forwprop4" } */ + +#ifndef INDEXTYPE +#define INDEXTYPE unsigned int +#endif +double vmul(INDEXTYPE *rowstart, INDEXTYPE *rowend, + double *luval, double *dst) +{ + double res = 0; + for (const INDEXTYPE * col = rowstart; col != rowend; ++col, ++luval) + res += *luval * dst[*col]; + return res; +} + +/* With gather emulation this should be profitable to vectorize from Power8. */ +/* { dg-final { scan-tree-dump "loop vectorized" "vect" } } */ +/* The index vector loads and promotions should be scalar after forwprop. */ +/* { dg-final { scan-tree-dump-not "vec_unpack" "forwprop4" } } */ |