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| author | Kewen Lin <linkw@linux.ibm.com> | 2020-07-31 07:49:39 -0500 |
|---|---|---|
| committer | Kewen Lin <linkw@linux.ibm.com> | 2020-07-31 08:16:42 -0500 |
| commit | c89366b12ff4f36253bae125b794cbe687f7e40b (patch) | |
| tree | 82ed9ae4b4046b9d619dcd0b006d13b78bace89a /gcc/genmatch.c | |
| parent | 89db36b05ea7df12926d198ec4b1be69af1b6555 (diff) | |
| download | gcc-c89366b12ff4f36253bae125b794cbe687f7e40b.zip gcc-c89366b12ff4f36253bae125b794cbe687f7e40b.tar.gz gcc-c89366b12ff4f36253bae125b794cbe687f7e40b.tar.bz2 | |
vect: Don't consider branch costs if no peeled iterations
Currently vectorizer cost modeling counts branch taken costs for
prologue and epilogue if the number of iterations is unknown.
But it isn't sensible if there are no peeled iterations.
This patch is to guard them under peel_iters_prologue > 0 or
peel_iters_epilogue > 0.
Bootstrapped/regtested on powerpc64le-linux-gnu and aarch64-linux-gnu.
gcc/ChangeLog:
* tree-vect-loop.c (vect_get_known_peeling_cost): Don't consider branch
taken costs for prologue and epilogue if they don't exist.
(vect_estimate_min_profitable_iters): Likewise.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/sve/cost_model_2.c: Adjust due to cost model
change.
Diffstat (limited to 'gcc/genmatch.c')
0 files changed, 0 insertions, 0 deletions