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| author | Richard Henderson <rth@redhat.com> | 2000-10-25 17:17:53 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-10-25 17:17:53 -0700 |
| commit | 78192b0984feaab04d373d0754d06d8a7cd623f3 (patch) | |
| tree | 8a8d4bbdf0a7cc70a66fa6ce4768a4ea50749ec3 /gcc/cse.c | |
| parent | 07b5e470a6e5a28f5e887d65c98174318b940812 (diff) | |
| download | gcc-78192b0984feaab04d373d0754d06d8a7cd623f3.zip gcc-78192b0984feaab04d373d0754d06d8a7cd623f3.tar.gz gcc-78192b0984feaab04d373d0754d06d8a7cd623f3.tar.bz2 | |
cse.c (find_comparison_args): Check that we can reverse a comparison if needed before accepting the substitution.
* cse.c (find_comparison_args): Check that we can reverse a
comparison if needed before accepting the substitution.
From-SVN: r37064
Diffstat (limited to 'gcc/cse.c')
| -rw-r--r-- | gcc/cse.c | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -3234,6 +3234,12 @@ find_comparison_args (code, parg1, parg2, pmode1, pmode2) if (x == 0) break; + /* If we need to reverse the comparison, make sure that that is + possible -- we can't necessarily infer the value of GE from LT + with floating-point operands. */ + if (reverse_code && ! can_reverse_comparison_p (x, NULL_RTX)) + break; + arg1 = XEXP (x, 0), arg2 = XEXP (x, 1); if (GET_RTX_CLASS (GET_CODE (x)) == '<') code = GET_CODE (x); |