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Re: optimization/8737: ICE in spill_failure, at reload1.c:1916 with SSE
- From: bangerth at dealii dot org
- To: demon_lord at myrealbox dot com, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org
- Date: 4 Dec 2002 22:05:14 -0000
- Subject: Re: optimization/8737: ICE in spill_failure, at reload1.c:1916 with SSE
- Reply-to: bangerth at dealii dot org, demon_lord at myrealbox dot com, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Old Synopsis: Pentium4 + SSE: register to spill in class 'FLOAT_REGS' [minimal example]
New Synopsis: ICE in spill_failure, at reload1.c:1916 with SSE
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Wed Dec 4 14:05:13 2002
State-Changed-Why:
Confirmed. With 3.2.2pre I get
tmp/g> /home/bangerth/bin/gcc-3.2.2-pre/bin/gcc -march=pentium4 -O -mfpmath=sse -c x.c
x.c: In function `main':
x.c:17: unable to find a register to spill in class `FLOAT_REGS'
x.c:17: this is the insn:
(insn 52 50 53 (set (subreg:SF (reg/v:DI 22 rxmm1 [67]) 0)
(float:SF (reg:DI 0 rax [73]))) 170 {*floatdisf2_i387_only} (nil)
(nil))
x.c:17: confused by earlier errors, bailing out
3.3pre gives a slightly different message, but dies as well:
tmp/g> /home/bangerth/bin/gcc-3.3-pre/bin/gcc -march=pentium4 -O -mfpmath=sse -c x.c
x.c: In function `main':
x.c:17: error: unable to find a register to spill in class `FLOAT_REGS'
x.c:17: error: this is the insn:
(insn 40 39 41 2 0x401812c0 (set (subreg:SF (reg/v:DI 22 rxmm1 [67]) 0)
(float:SF (reg:DI 0 rax [73]))) 126 {*floatdisf2_i387_only} (nil)
(nil))
x.c:17: internal compiler error: in spill_failure, at reload1.c:1916
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http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8737