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| author | John David Anglin <danglin@gcc.gnu.org> | 2017-05-10 22:54:07 +0000 |
|---|---|---|
| committer | John David Anglin <danglin@gcc.gnu.org> | 2017-05-10 22:54:07 +0000 |
| commit | 212b7e9cf3ea60a38943239707d82ab369e83c71 (patch) | |
| tree | 52850484ab8d738441c84b59321edd15bdcf7411 /gcc | |
| parent | 3aa0a770a4b1368a9f2ccc262f483cc811ca9331 (diff) | |
| download | gcc-212b7e9cf3ea60a38943239707d82ab369e83c71.zip gcc-212b7e9cf3ea60a38943239707d82ab369e83c71.tar.gz gcc-212b7e9cf3ea60a38943239707d82ab369e83c71.tar.bz2 | |
re PR target/79027 (fold-const.c:11104:1: internal compiler error: Floating point exception)
PR target/79027
* config/pa/pa.c (pa_cannot_change_mode_class): Reject changes to/from
modes with zero size. Enhance comment.
From-SVN: r247869
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/pa/pa.c | 20 |
2 files changed, 18 insertions, 8 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 075b50d..4483f33 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-05-10 John David Anglin <danglin@gcc.gnu.org> + + PR target/79027 + * config/pa/pa.c (pa_cannot_change_mode_class): Reject changes to/from + modes with zero size. Enhance comment. + 2017-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com> * config/rs6000/rs6000.c (altivec_init_builtins): Define POWER8 diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c index 3f7b2c7..874d12d 100644 --- a/gcc/config/pa/pa.c +++ b/gcc/config/pa/pa.c @@ -9962,19 +9962,23 @@ pa_cannot_change_mode_class (machine_mode from, machine_mode to, if (from == to) return false; + if (GET_MODE_SIZE (from) == GET_MODE_SIZE (to)) + return false; + + /* Reject changes to/from modes with zero size. */ + if (!GET_MODE_SIZE (from) || !GET_MODE_SIZE (to)) + return true; + /* Reject changes to/from complex and vector modes. */ if (COMPLEX_MODE_P (from) || VECTOR_MODE_P (from) || COMPLEX_MODE_P (to) || VECTOR_MODE_P (to)) return true; - if (GET_MODE_SIZE (from) == GET_MODE_SIZE (to)) - return false; - - /* There is no way to load QImode or HImode values directly from - memory. SImode loads to the FP registers are not zero extended. - On the 64-bit target, this conflicts with the definition of - LOAD_EXTEND_OP. Thus, we can't allow changing between modes - with different sizes in the floating-point registers. */ + /* There is no way to load QImode or HImode values directly from memory + to a FP register. SImode loads to the FP registers are not zero + extended. On the 64-bit target, this conflicts with the definition + of LOAD_EXTEND_OP. Thus, we can't allow changing between modes with + different sizes in the floating-point registers. */ if (MAYBE_FP_REG_CLASS_P (rclass)) return true; |