diff options
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/ia64/ia64.h | 7 | ||||
| -rw-r--r-- | gcc/reload.c | 7 |
3 files changed, 17 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1e0953d..6965aea 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2000-09-07 Jim Wilson <wilson@cygnus.com> + + * reload.c (push_reload): Use CLASS_CANNOT_CHANGE_MODE_P in addition + to CLASS_CANNOT_CHANGE_MODE. + * config/ia64/ia64.h (CLASS_CANNOT_CHANGE_MODE_P): True only if the + mode classes are different. + 2000-09-07 Zack Weinberg <zack@wolery.cumb.org> * cpplib.h (struct cpp_options): Add user_label_prefix member, diff --git a/gcc/config/ia64/ia64.h b/gcc/config/ia64/ia64.h index 7064745..86463b4 100644 --- a/gcc/config/ia64/ia64.h +++ b/gcc/config/ia64/ia64.h @@ -1055,9 +1055,12 @@ enum reg_class #define CLASS_CANNOT_CHANGE_MODE FR_REGS -/* Defines illegal mode changes for CLASS_CANNOT_CHANGE_MODE. */ +/* Defines illegal mode changes for CLASS_CANNOT_CHANGE_MODE. + In FP regs, we can't change FP values to integer values and vice + versa, but we can change e.g. DImode to SImode. */ -#define CLASS_CANNOT_CHANGE_MODE_P(FROM,TO) 1 +#define CLASS_CANNOT_CHANGE_MODE_P(FROM,TO) \ + (GET_MODE_CLASS (FROM) != GET_MODE_CLASS (TO)) /* A C expression that defines the machine-dependent operand constraint letters (`I', `J', `K', .. 'P') that specify particular ranges of diff --git a/gcc/reload.c b/gcc/reload.c index d83b1f6..d8abd39 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -946,7 +946,8 @@ push_reload (in, out, inloc, outloc, class, if (in != 0 && GET_CODE (in) == SUBREG && (SUBREG_WORD (in) == 0 || strict_low) #ifdef CLASS_CANNOT_CHANGE_MODE - && class != CLASS_CANNOT_CHANGE_MODE + && (class != CLASS_CANNOT_CHANGE_MODE + || ! CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (SUBREG_REG (in)), inmode)) #endif && (CONSTANT_P (SUBREG_REG (in)) || GET_CODE (SUBREG_REG (in)) == PLUS @@ -1051,7 +1052,9 @@ push_reload (in, out, inloc, outloc, class, if (out != 0 && GET_CODE (out) == SUBREG && (SUBREG_WORD (out) == 0 || strict_low) #ifdef CLASS_CANNOT_CHANGE_MODE - && class != CLASS_CANNOT_CHANGE_MODE + && (class != CLASS_CANNOT_CHANGE_MODE + || ! CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (SUBREG_REG (out)), + outmode)) #endif && (CONSTANT_P (SUBREG_REG (out)) || strict_low |