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fold-const.c (fold_real_zero_addition_p): Don't fold a zero addition in the presence of signaling NaNs.

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* fold-const.c (fold_real_zero_addition_p): Don't fold a zero
	addition in the presence of signaling NaNs.

From-SVN: r63133
This commit is contained in:
Roger Sayle 2003-02-19 22:59:33 +00:00
parent b5a49c0bc8
commit 3bc400cdc1
2 changed files with 13 additions and 3 deletions
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12
gcc/ChangeLog
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@ -1,3 +1,8 @@
2003-02-19 Roger Sayle <roger@eyesopen.com>
* fold-const.c (fold_real_zero_addition_p): Don't fold a zero
addition in the presence of signaling NaNs.
2003-02-19 Krister Walfridsson <cato@df.lth.se>
* tm.texi (INIT_CUMULATIVE_ARGS): Fix typo.
@ -109,9 +114,10 @@ Tue Feb 18 23:50:59 CET 2003 Jan Hubicka <jh@suse.cz>
(cgraph_expand_function): Rewrite.
2003-02-18 Matt Austern <austern@apple.com>
* toplev.c, langhooks.c, langhooks-def.h: Move
write_global_declarations from toplev.c to langhooks.c.
2003-02-18 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.c (general_operand_src): Always check
@ -168,8 +174,8 @@ Tue Feb 18 23:50:59 CET 2003 Jan Hubicka <jh@suse.cz>
Tue Feb 18 20:15:54 2003 J"orn Rennecke <joern.rennecke@superh.com>
* sh.c (calc_live_regs): Also check GET_CODE when checking if initial value
for PR_REG is still the PR_REG register.
* sh.c (calc_live_regs): Also check GET_CODE when checking if
initial value for PR_REG is still the PR_REG register.
2003-02-18 Jim Wilson <wilson@redhat.com>

4
gcc/fold-const.c
View File

@ -4642,6 +4642,10 @@ fold_real_zero_addition_p (type, addend, negate)
if (!real_zerop (addend))
return false;
/* Don't allow the fold with -fsignaling-nans. */
if (HONOR_SNANS (TYPE_MODE (type)))
return false;
/* Allow the fold if zeros aren't signed, or their sign isn't important. */
if (!HONOR_SIGNED_ZEROS (TYPE_MODE (type)))
return true;