| Summary: | ICE: in extract_insn, at recog.c:2109 (unrecognizable insn) when building Mesa on ARM | ||
|---|---|---|---|
| Product: | gcc | Reporter: | Thierry Reding <thierry.reding> |
| Component: | target | Assignee: | Not yet assigned to anyone <unassigned> |
| Status: | NEW --- | ||
| Severity: | normal | CC: | ramana, steven |
| Priority: | P3 | Keywords: | ice-on-valid-code |
| Version: | 4.6.2 | ||
| Target Milestone: | --- | ||
| Host: | Target: | arm-unknown-linux-gnueabi | |
| Build: | Known to work: | ||
| Known to fail: | Last reconfirmed: | 2012-01-21 00:00:00 | |
| Attachments: |
Preprocessed source.
reduced testcase |
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Description
Thierry Reding
2012-01-17 13:58:50 UTC
Created attachment 26403 [details]
reduced testcase
Reduced testcase.
Configured with :
--target=arm-linux-gnueabi --with-cpu=cortex-a9 --with-fpu=neon --with-float=softfp -
Command line options. :
./xgcc -B`pwd` -S -O2 -fPIC -mapcs -O2 -Wall -ffast-math -mtune=cortex-a9 besttry.c
Ramana
> Configured with :
>
> --target=arm-linux-gnueabi --with-cpu=cortex-a9 --with-fpu=neon
> --with-float=softfp -
>
> Command line options. :
>
> ./xgcc -B`pwd` -S -O2 -fPIC -mapcs -O2 -Wall -ffast-math
> -mtune=cortex-a9 besttry.c
Hi Ramana,
I can confirm that your reduced testcase triggers the ICE on the
cross-compiler that I use, although I need to add the following
command-line options:
-march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp
I guess you get these implicitly because of the different options
that you passed at configuration.
Thanks for looking at this.
Thierry
(In reply to comment #0) > However, the issue is no longer present in the > latest 4.7 snapshot (tested with a custom toolchain based on gcc-4.7-20120114). Using Ramana's reduced test case I still get the ICE with gcc-4.7-20120218. This bug happens in reload... With slightly modified test case (manually inlined apply_aa_coverage()):
BEFORE RELOAD:
(insn 142 133 314 9 (set (subreg:SI (reg:HI 283) 0)
(unsigned_fix:SI (fix:SF (reg/v:SF 226 [ a ])))) besttry.c:73 682 {fixuns_truncsfsi2}
(expr_list:REG_DEAD (reg/v:SF 226 [ a ])
(nil)))
Reloads for insn # 142
Reload 0: reload_in (SI) = (plus:SI (reg/f:SI 11 fp)
(const_int -65536 [0xffffffffffff0000]))
CORE_REGS, RELOAD_FOR_OUTPUT_ADDRESS (opnum = 0)
reload_in_reg: (plus:SI (reg/f:SI 11 fp)
(const_int -65536 [0xffffffffffff0000]))
reload_reg_rtx: (reg:SI 12 ip)
Reload 1: GENERAL_REGS, RELOAD_FOR_OUTPUT_ADDRESS (opnum = 0), can't combine, secondary_reload_p
reload_reg_rtx: (reg:DI 8 r8)
Reload 2: GENERAL_REGS, RELOAD_FOR_OUTPUT_ADDRESS (opnum = 0), can't combine, secondary_reload_p
reload_reg_rtx: (reg:SI 10 sl)
secondary_out_reload = 1
secondary_out_icode = reload_outhi
Reload 3: reload_out (SI) = (subreg:SI (mem/c:HI (plus:SI (plus:SI (reg/f:SI 11 fp)
(const_int -65536 [0xffffffffffff0000]))
(const_int -52 [0xffffffffffffffcc])) [14 %sfp+-65544 S2 A64]) 0)
VFP_LO_REGS, RELOAD_FOR_OUTPUT (opnum = 0)
reload_out_reg: (subreg:SI (reg:HI 283) 0)
reload_reg_rtx: (reg:SI 77 s14)
secondary_out_reload = 2
AFTER RELOAD:
(insn 142 133 355 9 (set (reg:SI 77 s14)
(unsigned_fix:SI (fix:SF (reg/v:SF 78 s15 [orig:226 a ] [226])))) besttry.c:73 682 {fixuns_truncsfsi2}
(nil))
(insn 355 142 356 9 (set (reg:SI 12 ip)
(plus:SI (reg/f:SI 11 fp)
(const_int -65536 [0xffffffffffff0000]))) besttry.c:73 4 {*arm_addsi3}
(nil))
(insn 356 355 357 9 (set (reg:HI 10 sl)
(reg:SI 77 s14)) besttry.c:73 -1
(nil))
(insn 357 356 358 9 (set (mem:QI (plus:SI (reg:SI 12 ip)
(const_int -52 [0xffffffffffffffcc])) [0 S1 A8])
(reg:QI 10 sl)) besttry.c:73 -1
(nil))
(insn 358 357 359 9 (set (reg:SI 8 r8)
(lshiftrt:SI (subreg:SI (reg:HI 10 sl) 0)
(const_int 8 [0x8]))) besttry.c:73 -1
(nil))
(insn 359 358 314 9 (set (mem:QI (plus:SI (reg:SI 12 ip)
(const_int -51 [0xffffffffffffffcd])) [0 S1 A8])
(reg:QI 8 r8)) besttry.c:73 -1
(nil))
besttry.c: In function ‘_swrast_write_rgba_span’:
besttry.c:108:1: error: unrecognizable insn:
(insn 356 355 357 9 (set (reg:HI 10 sl)
(reg:SI 77 s14)) besttry.c:73 -1
(nil))
besttry.c:108:1: internal compiler error: in extract_insn, at recog.c:2123
Looks like a secondary reload failed.
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