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| author | Kewen Lin <linkw@linux.ibm.com> | 2020-12-16 00:28:44 -0600 |
|---|---|---|
| committer | Kewen Lin <linkw@linux.ibm.com> | 2020-12-16 02:12:08 -0600 |
| commit | 31008a8bb30d8979bba5240be6b504140c5665ff (patch) | |
| tree | bfe0ba276beb88f025a38c239bc54a981c05734e /gcc/ada/adaint.c | |
| parent | a3bac40469b7052bfadc21cad0e53f40b147e937 (diff) | |
| download | gcc-31008a8bb30d8979bba5240be6b504140c5665ff.zip gcc-31008a8bb30d8979bba5240be6b504140c5665ff.tar.gz gcc-31008a8bb30d8979bba5240be6b504140c5665ff.tar.bz2 | |
rs6000: Use subreg for QI/HI vector init
This patch is to use paradoxical subreg instead of
zero_extend for promoting QI/HI to SI/DI when we
want to construct one vector with these modes.
Since we do the gpr->vsx movement and vector merge
or pack later, the high part is useless and safe to
use paradoxical subreg. It can avoid useless rlwinms
generated for signed cases.
Bootstrapped/regtested on powerpc64le-linux-gnu P9.
gcc/ChangeLog:
* config/rs6000/rs6000.c (rs6000_expand_vector_init): Use
paradoxical subreg instead of zero_extend for QI/HI promotion.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr96933-1.c: Adjusted to check no rlwinm.
* gcc.target/powerpc/pr96933-2.c: Likewise.
Diffstat (limited to 'gcc/ada/adaint.c')
0 files changed, 0 insertions, 0 deletions