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| author | Michael Meissner <meissner@linux.vnet.ibm.com> | 2015-08-12 21:54:23 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 2015-08-12 21:54:23 +0000 |
| commit | 683be46fa65feb540990b6cfea729f4234d71298 (patch) | |
| tree | e042ba5e831a20c5580d65644efdfb4ad9e683ad /gcc/go | |
| parent | 17795822b27b7b5381525b1d7c98ca181be9bc80 (diff) | |
| download | gcc-683be46fa65feb540990b6cfea729f4234d71298.zip gcc-683be46fa65feb540990b6cfea729f4234d71298.tar.gz gcc-683be46fa65feb540990b6cfea729f4234d71298.tar.bz2 | |
re PR target/67071 (GCC misses an optimization to load vector constants)
[gcc]
2015-08-12 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/67071
* config/rs6000/predicates.md (easy_vector_constant_vsldoi): New
predicate to allow construction of vector constants using the
VSLDOI vector shift instruction.
* config/rs6000/rs6000-protos.h (vspltis_shifted): Add
declaration.
* config/rs6000/rs6000.c (vspltis_shifted): New function to return
the number of bytes to be shifted left and filled in with either
all zero or all one bits.
(gen_easy_altivec_constant): Call vsplitis_shifted if no other
methods exist.
(output_vec_const_move): On power8, generate XXLORC to generate
a vector constant with all 1's. Do a split if we need to use a
VSLDOI instruction.
* config/rs6000/rs6000.h (EASY_VECTOR_MSB): Use mode mask to
properly test for the MSB.
* config/rs6000/altivec.md (VSLDOI splitter): Add splitter for
vector constants that can be created with VSLDOI.
[gcc/testsuite]
2015-08-12 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/67071
* gcc.target/powerpc/pr67071-1.c: New file to test PR 67071 new
vector constants.
* gcc.target/powerpc/pr67071-2.c: Likewise.
* gcc.target/powerpc/pr67071-3.c: Likewise.
From-SVN: r226836
Diffstat (limited to 'gcc/go')
0 files changed, 0 insertions, 0 deletions