http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46175
Summary: ICE: in rtl_verify_flow_info_1, at cfgrtl.c:2037: flow
control insn inside a basic block with -O -fgcse
-fno-guess-branch-probability -freorder-blocks and asm
goto
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Created attachment 22154
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22154
reduced testcase
Compiler output:
$ gcc -O -fgcse -fno-guess-branch-probability -freorder-blocks pr46175.c
pr46175.c: In function 'foo':
pr46175.c:27:1: error: in basic block 7:
pr46175.c:27:1: error: flow control insn inside a basic block
(jump_insn 14 46 61 7 (parallel [
(asm_operands/v ("") ("") 0 []
[]
[
(label_ref:DI 16)
] pr46175.c:27)
(clobber (reg:QI 18 fpsr))
(clobber (reg:QI 17 flags))
]) pr46175.c:19 -1
(expr_list:REG_UNUSED (reg:QI 18 fpsr)
(expr_list:REG_UNUSED (reg:QI 17 flags)
(nil)))
-> 16)
pr46175.c:27:1: internal compiler error: in rtl_verify_flow_info_1, at
cfgrtl.c:2037
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Tested revisions:
r165915 - crash
r153685 - crash
4.5 r165781 - crash
4.4 r165754 - doesn't know asm goto
