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| author | Jakub Jelinek <jakub@redhat.com> | 2000-08-25 14:40:18 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2000-08-25 14:40:18 +0200 |
| commit | 1f9124e42e485a2afe439fbd6966a5263783186c (patch) | |
| tree | 4019c2c5f13f052c80b67ec62cb6bda31a0b7332 | |
| parent | 22a4158c6afcab145ec63f3bd81907a19754b04f (diff) | |
| download | gcc-1f9124e42e485a2afe439fbd6966a5263783186c.zip gcc-1f9124e42e485a2afe439fbd6966a5263783186c.tar.gz gcc-1f9124e42e485a2afe439fbd6966a5263783186c.tar.bz2 | |
i386.c (ix86_expand_branch): Treat GE and GEU the same way as LT and LTU when...
* config/i386/i386.c (ix86_expand_branch): Treat GE and GEU the same
way as LT and LTU when the second operand has 0 in low word.
From-SVN: r35982
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 24 |
2 files changed, 19 insertions, 10 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e4b4d6e..e07ca1c 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2000-08-25 Jakub Jelinek <jakub@redhat.com> + + * config/i386/i386.c (ix86_expand_branch): Treat GE and GEU the same + way as LT and LTU when the second operand has 0 in low word. + 2000-08-26 Michael Hayes <mhayes@cygnus.com> * basic-block.h (struct loop): Rename `exits' field to diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 4c21a88..9fa6fab 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -4977,17 +4977,21 @@ ix86_expand_branch (code, label) return; } - /* Otherwise, if we are doing less-than, op1 is a constant and the - low word is zero, then we can just examine the high word. */ + /* Otherwise, if we are doing less-than or greater-or-equal-than, + op1 is a constant and the low word is zero, then we can just + examine the high word. */ - if (GET_CODE (hi[1]) == CONST_INT && lo[1] == const0_rtx - && (code == LT || code == LTU)) - { - ix86_compare_op0 = hi[0]; - ix86_compare_op1 = hi[1]; - ix86_expand_branch (code, label); - return; - } + if (GET_CODE (hi[1]) == CONST_INT && lo[1] == const0_rtx) + switch (code) + { + case LT: case LTU: case GE: case GEU: + ix86_compare_op0 = hi[0]; + ix86_compare_op1 = hi[1]; + ix86_expand_branch (code, label); + return; + default: + break; + } /* Otherwise, we need two or three jumps. */ |