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| author | Jakub Jelinek <jakub@redhat.com> | 2012-06-15 13:07:47 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2012-06-15 13:07:47 +0200 |
| commit | 079c527f5e7593f8563e3415ad04cf1f0e5d9269 (patch) | |
| tree | 5c72c952d5e64996ab124de5c892988b2985f3d4 /gcc/expr.h | |
| parent | c55224dc4d22bbb0536f2386371f362fe066527e (diff) | |
| download | gcc-079c527f5e7593f8563e3415ad04cf1f0e5d9269.tar.gz | |
re PR tree-optimization/51581 (Integer division by constant is not vectorized)
PR tree-optimization/51581
* expr.h (choose_multiplier): New prototype.
* expmed.c (choose_multiplier): No longer static.
Change multiplier_ptr from rtx * to UHWI *.
(expand_divmod): Adjust callers.
* tree-vect-patterns.c (vect_recog_sdivmod_pow2_pattern):
Renamed to...
(vect_recog_divmod_pattern): ... this. Pass bb_vinfo as last
argument to new_stmt_vec_info. Attempt to optimize also divisions
by non-pow2 constants if integer vector division isn't supported.
* tree-vect-stmts.c (vect_analyze_stmt): If node != NULL,
don't look at pattern stmts and sequences.
* gcc.c-torture/execute/pr51581-1.c: New test.
* gcc.c-torture/execute/pr51581-2.c: New test.
* gcc.dg/vect/pr51581-1.c: New test.
* gcc.dg/vect/pr51581-2.c: New test.
* gcc.dg/vect/pr51581-3.c: New test.
* gcc.target/i386/avx-pr51581-1.c: New test.
* gcc.target/i386/avx-pr51581-2.c: New test.
* gcc.target/i386/avx2-pr51581-1.c: New test.
* gcc.target/i386/avx2-pr51581-2.c: New test.
* gcc.dg/vect/slp-26.c (main1): Divide by 0x8031 instead of 3.
From-SVN: r188656
Diffstat (limited to 'gcc/expr.h')
| -rw-r--r-- | gcc/expr.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/expr.h b/gcc/expr.h index 0096367a727..7444baf166d 100644 --- a/gcc/expr.h +++ b/gcc/expr.h @@ -243,6 +243,13 @@ extern rtx emit_store_flag (rtx, enum rtx_code, rtx, rtx, enum machine_mode, /* Like emit_store_flag, but always succeeds. */ extern rtx emit_store_flag_force (rtx, enum rtx_code, rtx, rtx, enum machine_mode, int, int); + +/* Choose a minimal N + 1 bit approximation to 1/D that can be used to + replace division by D, and put the least significant N bits of the result + in *MULTIPLIER_PTR and return the most significant bit. */ +extern unsigned HOST_WIDE_INT choose_multiplier (unsigned HOST_WIDE_INT, int, + int, unsigned HOST_WIDE_INT *, + int *, int *); /* Functions from builtins.c: */ extern rtx expand_builtin (tree, rtx, rtx, enum machine_mode, int); |