http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55195
Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
Component|middle-end |target
--- Comment #4 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org>
2012-11-04 17:31:52 UTC ---
(In reply to comment #3)
In the ccA1Vjgkjx.234r.shorten dump file,
between L19464 and L19463, there is but one call instruction, a basic block
start, a barrier, and some 600 NOTE_INSN_VAR_LOCATION:
(code_label 4141 28778 2472 19464 "" [1 uses])
(note 2472 4141 3318 [bb 311] NOTE_INSN_BASIC_BLOCK)
(call_insn:TI 3318 2472 3319 (parallel [
(call (mem:SI (symbol_ref/v:SI ("@_Jv_ThrowBadArrayIndex") [flags
0x241] <function_decl 0xb73b8700 _Jv_ThrowBadArrayIndex>) [0 S4 A32])
(const_int 16 [0x10]))
(clobber (reg:SI 1 %r1))
(clobber (reg:SI 2 %r2))
(use (reg:SI 19 %r19))
(use (const_int 0 [0]))
])
/ssd/synopsys/arc_gnu_4.8-r192641/gcc-4.8/libjava/classpath/gnu/java/nio/charset/MacSymbol.java:73
198 {*call_symref_pic_post_reload}
(expr_list:REG_DEAD (reg:SI 26 %r26)
(expr_list:REG_DEAD (reg:SI 19 %r19)
(expr_list:REG_NORETURN (const_int 0 [0])
(nil))))
(expr_list:REG_CC_SETTER (use (reg:SI 26 %r26))
(nil)))
(barrier 3319 3318 28981)
(note 28981 3319 28980 (nil) NOTE_INSN_CALL_ARG_LOCATION)
...
(note 29183 29182 4140 (var_location D.16611 (nil)) NOTE_INSN_VAR_LOCATION)
(code_label 4140 29183 2459 19463 "" [1 uses])
The instruction call_symref_pic_post_reload has the following length
attribute setting:
(set (attr "length") (symbol_ref "pa_attr_length_call (insn, 0)"))
Such a length attribute is not considered variable by shorten_branches.
You need to include a clause that is directly in the attribute, e.g.
(and (match_test "0") (eq (match_dup 0) (pc)))
