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* config/epiphany/epiphany.md (isub_i+1): Work around generator bug. 

From-SVN: r193919
This commit is contained in:
Joern Rennecke 2012-11-29 02:39:20 +00:00 committed by Joern Rennecke
parent 2d7aa5780c
commit 9b7542b9c2
2 changed files with 12 additions and 7 deletions
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2
gcc/ChangeLog
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@ -10,6 +10,8 @@
* config/epiphany/t-epiphany (SPECS): Set.
(specs): New rule.
* config/epiphany/epiphany.md (isub_i+1): Work around generator bug.
2012-11-28 Jakub Jelinek <jakub@redhat.com>
PR debug/36728

17
gcc/config/epiphany/epiphany.md
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@ -1024,19 +1024,22 @@
; use next_active_insn to look at the 'following' insn. That should
; exist, because peephole2 runs after reload, and there has to be
; a return after an fp_int insn.
; ??? However, we can not even ordinarily match the preceding insn;
; there is some bug in the generators such that then it leaves out
; the check for PARALLEL before the length check for the then-second
; main insn. Observed when compiling compatibility-atomic-c++0x.cc
; from libstdc++-v3.
(define_peephole2
[(match_parallel 5 "float_operation" [(match_operand 6 "" "")])
(match_parallel 3 "float_operation"
[(match_parallel 3 "float_operation"
[(set (match_operand:SI 0 "gpr_operand" "")
(match_operator:SI 4 "addsub_operator"
[(match_operand:SI 1 "gpr_operand" "")
(match_operand:SI 2 "gpr_operand" "")]))
(clobber (reg:CC_FP CCFP_REGNUM))])]
"get_attr_sched_use_fpu (peep2_next_insn (0))
&& peep2_regno_dead_p (2, CC_REGNUM)
&& get_attr_sched_use_fpu (next_active_insn (peep2_next_insn (1)))"
[(match_dup 5)
(parallel [(set (match_dup 0) (match_dup 4))
"get_attr_sched_use_fpu (prev_active_insn (peep2_next_insn (0)))
&& peep2_regno_dead_p (1, CC_REGNUM)
&& get_attr_sched_use_fpu (next_active_insn (peep2_next_insn (0)))"
[(parallel [(set (match_dup 0) (match_dup 4))
(clobber (reg:CC CC_REGNUM))])]
)