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| author | Jim Wilson <wilson@gcc.gnu.org> | 2000-12-12 13:23:04 -0800 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 2000-12-12 13:23:04 -0800 |
| commit | 734508eae57528457d34df6762c38ded3843bfa5 (patch) | |
| tree | 1c83248ee4b0f3902f9acfb00de3cf4189a1bc8b /gcc/rtlanal.c | |
| parent | f2beb7ef551e6d8560f95a1ff2772720716b1697 (diff) | |
| download | gcc-734508eae57528457d34df6762c38ded3843bfa5.tar.gz | |
Fix for ia64-linux glibc miscompilation of nan tests.
* rtlanal.c (may_trap_p): Check operand modes of LE, LT, GE, and GT.
From-SVN: r38209
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 88b49fe649e..073f37c438c 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1947,8 +1947,16 @@ may_trap_p (x) certainly may trap. */ return 1; + case GE: + case GT: + case LE: + case LT: case COMPARE: - /* Any floating comparison may trap. */ + /* Some floating point comparisons may trap. */ + /* ??? There is no machine independent way to check for tests that trap + when COMPARE is used, though many targets do make this distinction. + For instance, sparc uses CCFPE for compares which generate exceptions + and CCFP for compares which do not generate exceptions. */ if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT) return 1; /* But often the compare has some CC mode, so check operand |