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| author | Jakub Jelinek <jakub@redhat.com> | 2003-07-08 09:26:27 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2003-07-08 09:26:27 +0200 |
| commit | 8df63efa77a00e164cf9a72379d338fcd21d92ca (patch) | |
| tree | de73e8f14fd2859092455bcb84b437c9ad016747 /gcc/unroll.c | |
| parent | 4b5cc2b3044351325dbafa6688387f8d57c65b63 (diff) | |
| download | gcc-8df63efa77a00e164cf9a72379d338fcd21d92ca.zip gcc-8df63efa77a00e164cf9a72379d338fcd21d92ca.tar.gz gcc-8df63efa77a00e164cf9a72379d338fcd21d92ca.tar.bz2 | |
unroll.c (reg_dead_after_loop): Check for reg in REG_EQUAL and REG_EQUIV notes as well.
* unroll.c (reg_dead_after_loop): Check for reg in REG_EQUAL and
REG_EQUIV notes as well.
* g++.dg/opt/strength-reduce.C: New test.
From-SVN: r69076
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 955136e..e557cb2 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -2899,11 +2899,15 @@ reg_dead_after_loop (const struct loop *loop, rtx reg) code = GET_CODE (insn); if (GET_RTX_CLASS (code) == 'i') { - rtx set; + rtx set, note; if (reg_referenced_p (reg, PATTERN (insn))) return 0; + note = find_reg_equal_equiv_note (insn); + if (note && reg_overlap_mentioned_p (reg, XEXP (note, 0))) + return 0; + set = single_set (insn); if (set && rtx_equal_p (SET_DEST (set), reg)) break; |