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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-07-30 20:28:45 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-07-30 20:28:45 +0000 |
| commit | f0422dfab041cf25c68461c023f974c19717c63e (patch) | |
| tree | 0c3bb9bd40751351e4c41eb0c315bf0ee6f7db77 /gcc/loop.c | |
| parent | cf40db41ee40522222ef279f708710d580c944ad (diff) | |
| download | gcc-f0422dfab041cf25c68461c023f974c19717c63e.tar.gz | |
* loop.c (check_dbra_loop): Allow LTU in the loop condition.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@69971 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/loop.c b/gcc/loop.c index c4d2779a18c..4a987d50337 100644 --- a/gcc/loop.c +++ b/gcc/loop.c @@ -8070,7 +8070,8 @@ check_dbra_loop (struct loop *loop, int insn_count) before_comparison = get_condition_for_loop (loop, p); if (before_comparison && XEXP (before_comparison, 0) == bl->biv->dest_reg - && GET_CODE (before_comparison) == LT + && (GET_CODE (before_comparison) == LT + || GET_CODE (before_comparison) == LTU) && XEXP (before_comparison, 1) == const0_rtx && ! reg_set_between_p (bl->biv->dest_reg, p, loop_start) && INTVAL (bl->biv->add_val) == -1) @@ -8241,7 +8242,8 @@ check_dbra_loop (struct loop *loop, int insn_count) /* for constants, LE gets turned into LT */ && (GET_CODE (comparison) == LT || (GET_CODE (comparison) == LE - && no_use_except_counting))) + && no_use_except_counting) + || GET_CODE (comparison) == LTU)) { HOST_WIDE_INT add_val, add_adjust, comparison_val = 0; rtx initial_value, comparison_value; |