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Fix ia64-linux compiler abort on perl.

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* 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.

From-SVN: r36256
This commit is contained in:
Jim Wilson 2000-09-08 01:35:53 +00:00 committed by Jim Wilson
parent f1158db342
commit 46146529f6
3 changed files with 17 additions and 4 deletions
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7
gcc/ChangeLog
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@ -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,

7
gcc/config/ia64/ia64.h
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@ -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

7
gcc/reload.c
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@ -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