diff options
| author | Richard Stallman <rms@gnu.org> | 1993-06-03 22:53:46 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-06-03 22:53:46 +0000 |
| commit | 12194c388f00739381f3c75737275d6a2862cb37 (patch) | |
| tree | b4f588c77a815ef5ed2aeba86adbe242ef346f56 | |
| parent | 0a8305859d2da1e7619cfda38dc3e5c45f01b65e (diff) | |
| download | gcc-12194c388f00739381f3c75737275d6a2862cb37.zip gcc-12194c388f00739381f3c75737275d6a2862cb37.tar.gz gcc-12194c388f00739381f3c75737275d6a2862cb37.tar.bz2 | |
(immed_real_const_1): Check explicitly for NaNs.
From-SVN: r4626
| -rw-r--r-- | gcc/varasm.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c index fea7083..6795444 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -1418,7 +1418,11 @@ immed_real_const_1 (d, mode) /* Avoid REAL_VALUES_EQUAL here in order to distinguish minus zero. */ if (!bcmp (&dconst0, &d, sizeof d)) return CONST0_RTX (mode); - else if (REAL_VALUES_EQUAL (dconst1, d)) + /* Check for NaN first, because some ports (specifically the i386) do not + emit correct ieee-fp code by default, and thus will generate a core + dump here if we pass a NaN to REAL_VALUES_EQUAL and if REAL_VALUES_EQUAL + does a floating point comparison. */ + else if (! REAL_VALUE_ISNAN (d) && REAL_VALUES_EQUAL (dconst1, d)) return CONST1_RTX (mode); if (sizeof u == 2 * sizeof (HOST_WIDE_INT)) |