optimization/10876: [3.3/3.4 regression] [Sparc] ICE in calculate_giv_inc at unroll.c:1588 on FP code

[Aaron Williams]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10876

I have attached the pre-processed source from which the sample code was taken.  
Unlike the test code, which does compile with -O3, the attached file also 
crashes.

Also, the below causes an abort instead of a segfault:

gcc -c -O3 gslfft_pp.c -fpeephole2 -fssa -falign-functions -falign-loops 
-foptimize-register-move -frename-registers -freorder-functions 
-freorder-blocks -fsched-interblock -fschedule-insns2 -fschedule-insns 
-frerun-loop-opt -frerun-cse-after-loop -floop-optimize -fgcse-lm 
-fdelayed-branch -fpeephole -freduce-all-givs -fprefetch-loop-arrays 
-funroll-loops -fstrength-reduce
gslfft.c: In function `gsl_power2_fftac':
gslfft.c:8810: warning: concatenation of string literals with __FUNCTION__ is 
deprecated
gslfft.c: In function `gsl_power2_fftsc':
gslfft.c:8836: warning: concatenation of string literals with __FUNCTION__ is 
deprecated
gslfft.c: In function `gsl_power2_fftar':
gslfft.c:8867: warning: concatenation of string literals with __FUNCTION__ is 
deprecated
gslfft.c: In function `gsl_power2_fftsr':
gslfft.c:8921: warning: concatenation of string literals with __FUNCTION__ is 
deprecated
gslfft.c: In function `gsl_power2_fftar_simple':
gslfft.c:9015: warning: concatenation of string literals with __FUNCTION__ is 
deprecated
gslfft.c: In function `gsl_power2_fftsr_simple':
gslfft.c:9039: warning: concatenation of string literals with __FUNCTION__ is 
deprecated
gslfft.c: In function `gsl_power2_fft256analysis_skip2':
gslfft.c:3445: internal compiler error: in calculate_giv_inc, at unroll.c:1693
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
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