[Bug rtl-optimization/82057] New: ICE with -fgraphite-identity

["sven.c.dack at sky dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82057

            Bug ID: 82057
           Summary: ICE with -fgraphite-identity
           Product: gcc
           Version: 7.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sven.c.dack at sky dot com
  Target Milestone: ---

Created attachment 42093
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42093&action=edit
bug.c

Hello,

while compiling ffmpeg with -fgraphite-identity did gcc run into an internal
compiler error. The original command line is this:

gcc -I. -Isrc/ -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -DPIC -DZLIB_CONST
-DHAVE_AV_CONFIG_H -pipe -O3 -march=native -fomit-frame-pointer
-fgraphite-identity -floop-nest-optimize -Ofast  -I/home/sven/av/include
-I/usr/local/cuda/include -I/usr/local/Video_Codec_SDK/Samples/common/inc 
-std=c11 -fomit-frame-pointer -fPIC -pthread -I/home/sven/gnu/include
-I/home/sven/av/include -I/home/sven/gnu/include
-I/home/sven/gnu/include/freetype2 -I/home/sven/gnu/include/libpng16
-I/home/sven/gnu/include -I/home/sven/gnu/include/harfbuzz
-I/home/sven/gnu/include/glib-2.0 -I/home/sven/gnu/lib/glib-2.0/include
-I/home/sven/gnu/include -I/home/sven/gnu/include/libxml2
-I/home/sven/gnu/include/freetype2 -I/home/sven/gnu/include/libpng16
-I/home/sven/gnu/include -I/home/sven/gnu/include/harfbuzz
-I/home/sven/gnu/include/glib-2.0 -I/home/sven/gnu/lib/glib-2.0/include
-I/home/sven/gnu/include -I/home/sven/gnu/include/freetype2
-I/home/sven/gnu/include/libpng16 -I/home/sven/gnu/include
-I/home/sven/gnu/include/harfbuzz -I/home/sven/gnu/include/glib-2.0
-I/home/sven/gnu/lib/glib-2.0/include -I/home/sven/gnu/include
-I/home/sven/av/include/opus -I/home/sven/av/include/opus
-I/home/sven/av/include -I/home/sven/av/include -I/home/sven/av/include
-I/home/sven/av/include -I/home/sven/gnu/include  -Wdeclaration-after-statement
-Wall -Wdisabled-optimization -Wpointer-arith -Wredundant-decls -Wwrite-strings
-Wtype-limits -Wundef -Wmissing-prototypes -Wno-pointer-to-int-cast
-Wstrict-prototypes -Wempty-body -Wno-parentheses -Wno-switch
-Wno-format-zero-length -Wno-pointer-sign -Wno-unused-const-variable -O3
-fno-math-errno -fno-signed-zeros -fno-tree-vectorize -Werror=format-security
-Werror=implicit-function-declaration -Werror=missing-prototypes
-Werror=return-type -Werror=vla -Wformat -fdiagnostics-color=auto
-Wno-maybe-uninitialized  -MMD -MF libavcodec/nellymoser.d -MT
libavcodec/nellymoser.o -c -o libavcodec/nellymoser.o
src/libavcodec/nellymoser.c
src/libavcodec/nellymoser.c: In function 'ff_nelly_get_sample_bits':
src/libavcodec/nellymoser.c:116:6: internal compiler error: in
outer_projection_mupa, at graphite-sese-to-poly.c:1019
 void ff_nelly_get_sample_bits(const float *buf, int *bits)
      ^~~~~~~~~~~~~~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.

I've stripped it down to:

gcc -O3 -fgraphite-identity bug.c -o bug.o
bug.c: In function 'ff_nelly_get_sample_bits':
bug.c:147:13: warning: implicit declaration of function 'abs'
[-Wimplicit-function-declaration]
         if (abs(big_bitsum-198) >=
             ^~~
bug.c:81:6: internal compiler error: in outer_projection_mupa, at
graphite-sese-to-poly.c:1019
 void ff_nelly_get_sample_bits(const float *buf, int *bits)
      ^~~~~~~~~~~~~~~~~~~~~~~~

and have attached the file bug.c, which is a preprocessed and stripped down
version of the file. I hope you can figure this one out.

I can reproduce the ICE with gcc 6.4 (Debian), 7.2 (Debian) and 7.2.1 (git).

Sven