At revision 125625 (and 125652) There is a bootstrap failure due to a SIGSEGV
while running gengtype in stage 2.
A successful bootstrap was done for r125494.
I think the dataflow branch merge is a likely culprit here.
The problem is that $gp is not being restored before a call to a local
function. Here is the dissassembly:
00003498 <write_func_for_structure>:
3498: 3c1c0000 lui gp,0x0
3498: R_MIPS_HI16 __gnu_local_gp
349c: 27bdff58 addiu sp,sp,-168
34a0: 279c0000 addiu gp,gp,0
34a0: R_MIPS_LO16 __gnu_local_gp
34a4: afbf00a4 sw ra,164(sp)
34a8: afbe00a0 sw s8,160(sp)
34ac: afb7009c sw s7,156(sp)
34b0: afb60098 sw s6,152(sp)
34b4: afb50094 sw s5,148(sp)
34b8: afb40090 sw s4,144(sp)
34bc: afb3008c sw s3,140(sp)
34c0: afb20088 sw s2,136(sp)
34c4: afb10084 sw s1,132(sp)
34c8: afb00080 sw s0,128(sp)
34cc: afbc0020 sw gp,32(sp)
34d0: 8cb00014 lw s0,20(a1)
34d4: 00c0a021 move s4,a2
34d8: afa400a8 sw a0,168(sp)
34dc: afa700b4 sw a3,180(sp)
34e0: 00a0f021 move s8,a1
34e4: 00002021 move a0,zero
34e8: 24070004 li a3,4
34ec: 24080006 li t0,6
34f0: 2406ffd8 li a2,-40
34f4: 02841021 addu v0,s4,a0
34f8: 12800007 beqz s4,3518 <write_func_for_structure+0x80>
34fc: 2484fffc addiu a0,a0,-4
3500: 8c430024 lw v1,36(v0)
3504: 10600004 beqz v1,3518 <write_func_for_structure+0x80>
3508: 00000000 nop
350c: 8c620000 lw v0,0(v1)
3510: 1047012e beq v0,a3,39cc
<write_func_for_structure+0x534>
3514: 00000000 nop
3518: 1486fff7 bne a0,a2,34f8
<write_func_for_structure+0x60>
351c: 02841021 addu v0,s4,a0
3520: 8f990000 lw t9,0(gp)
3520: R_MIPS_CALL16 memset
3524: 27a20028 addiu v0,sp,40
3528: 00002821 move a1,zero
352c: 24060048 li a2,72
3530: 00402021 move a0,v0
3534: 0320f809 jalr t9
3538: afa20078 sw v0,120(sp)
353c: 0c000000 jal 0 <get_lang_bitmap>
353c: R_MIPS_26 get_output_file_with_visibility
3540: 02002021 move a0,s0
After the call to memset the gp should be restored. It is required by the call
to get_output_file_with_visibility.
--
Summary: [4.3 Regression] Bootstrap failure running gengtype in
stage 2.
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: daney at gcc dot gnu dot org
GCC build triplet: mipsel-linux-gnu
GCC host triplet: mipsel-linux-gnu
GCC target triplet: mipsel-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32313
