diff options
| author | Richard Henderson <rth@redhat.com> | 2004-09-24 12:47:05 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2004-09-24 12:47:05 -0700 |
| commit | 41bf2a8b17267a42615392ad9da37081f59e428c (patch) | |
| tree | 8f489fcd2a7911641c9c974bdfda7d1ab77702cc /gcc/combine.c | |
| parent | 84f7a28c9b3fe007dbbdd332643cb6858997ba8f (diff) | |
| download | gcc-41bf2a8b17267a42615392ad9da37081f59e428c.zip gcc-41bf2a8b17267a42615392ad9da37081f59e428c.tar.gz gcc-41bf2a8b17267a42615392ad9da37081f59e428c.tar.bz2 | |
re PR middle-end/17503 (quadratic behaviour in invalid_mode_change_p)
PR rtl-opt/17503
* regclass.c (subregs_of_mode): Turn into an htab. Make static.
(som_hash, som_eq): New.
(init_subregs_of_mode, record_subregs_of_mode): New.
(cannot_change_mode_set_regs): Rewrite for htab implementation.
(invalid_mode_change_p): Likewise.
* combine.c (gen_lowpart_for_combine): Use record_subregs_of_mode.
* flow.c (mark_used_regs): Likewise.
(life_analysis): Use init_subregs_of_mode.
* regs.h (subregs_of_mode): Remove.
* rtl.h (init_subregs_of_mode, record_subregs_of_mode): Declare.
From-SVN: r88067
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 24ebbc9..f0b5b06 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -9327,13 +9327,8 @@ gen_lowpart_for_combine (enum machine_mode mode, rtx x) result = gen_lowpart_common (mode, x); #ifdef CANNOT_CHANGE_MODE_CLASS - if (result != 0 - && GET_CODE (result) == SUBREG - && REG_P (SUBREG_REG (result)) - && REGNO (SUBREG_REG (result)) >= FIRST_PSEUDO_REGISTER) - bitmap_set_bit (&subregs_of_mode, REGNO (SUBREG_REG (result)) - * MAX_MACHINE_MODE - + GET_MODE (result)); + if (result != 0 && GET_CODE (result) == SUBREG) + record_subregs_of_mode (result); #endif if (result) |