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re PR target/27858 (ICE in spill_failure, at reload1.c:1911while bootstrapping 4.2 on alpha)

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PR target/27858
	Revert incorrect fix for PR target/27158
	2006-05-08  Roger Sayle  <roger@eyesopen.com>
	* reload.c (find_reloads_toplev): Only return the simplified SUBREG
	of a reg_equiv_constant if the result is a legitimate constant.

From-SVN: r114559
This commit is contained in:
Roger Sayle 2006-06-12 02:10:24 +00:00 • committed by Roger Sayle
parent 0972012c8a
commit 4119019bd7
2 changed files with 10 additions and 4 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2006-06-11 Roger Sayle <roger@eyesopen.com>
PR target/27858
Revert incorrect fix for PR target/27158
2006-05-08 Roger Sayle <roger@eyesopen.com>
* reload.c (find_reloads_toplev): Only return the simplified SUBREG
of a reg_equiv_constant if the result is a legitimate constant.
2006-06-11 Roger Sayle <roger@eyesopen.com>
PR target/27158

6
gcc/reload.c
View file

@ -4572,8 +4572,7 @@ find_reloads_toplev (rtx x, int opnum, enum reload_type type,
&& reg_renumber[regno] < 0
&& reg_equiv_constant[regno] != 0
&& (tem = gen_lowpart_common (GET_MODE (x),
reg_equiv_constant[regno])) != 0
&& LEGITIMATE_CONSTANT_P (tem))
reg_equiv_constant[regno])) != 0)
return tem;
if (regno >= FIRST_PSEUDO_REGISTER
@ -4584,8 +4583,7 @@ find_reloads_toplev (rtx x, int opnum, enum reload_type type,
simplify_gen_subreg (GET_MODE (x), reg_equiv_constant[regno],
GET_MODE (SUBREG_REG (x)), SUBREG_BYTE (x));
gcc_assert (tem);
if (LEGITIMATE_CONSTANT_P (tem))
return tem;
return tem;
}
/* If the subreg contains a reg that will be converted to a mem,