https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212
--- Comment #298 from John Paul Adrian Glaubitz <glaubitz at physik dot
fu-berlin.de> ---
Here is one ICE I have run into while building webkit2gtk with the latest
patches on top of an older GCC snapshot:
/usr/bin/g++-15 -DBUILDING_GTK__=1 -DBUILDING_WEBKIT=1 -DBUILDING_WITH_CMAKE=1
-DGETTEXT_PACKAGE=\"WebKitGTK-4.1\" -DHAVE_CONFIG_H=1 -DJSC_GLIB_API_ENABLED
-DPAS_BMALLOC=1 -DSKCMS_DISABLE_HSW -DSKCMS_DISABLE_SKX -DSKIA_IMPLEMENTATION=1
-DSK_ASSUME_GL=0 -DSK_ASSUME_GL_ES=1 -DSK_ASSUME_WEBGL=0 -DSK_CODEC_DECODES_PNG
-DSK_DISABLE_LEGACY_GL_MAKE_NATIVE_INTERFACE
-DSK_DISABLE_LEGACY_IMAGE_READBUFFER -DSK_DISABLE_LEGACY_INIT_DECODERS
-DSK_DISABLE_LEGACY_PNG_WRITEBUFFER -DSK_DISABLE_TRACING
-DSK_DISABLE_WEBGL_INTERFACE -DSK_ENABLE_PRECOMPILE -DSK_GAMMA_APPLY_TO_A8
-DSK_GANESH -DSK_GL -DSK_R32_SHIFT=16 -DSK_RELEASE
-DSK_TYPEFACE_FACTORY_FREETYPE
-I/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0/Source/ThirdParty/skia
-isystem /usr/include/freetype2 -fdiagnostics-color=always -Wextra -Wall -pipe
-fmax-errors=20 -Wno-odr -Wno-stringop-overread -Wno-stringop-overflow
-Wno-nonnull -Wno-array-bounds -Wno-expansion-to-defined -Wno-noexcept-type
-Wno-psabi -Wno-misleading-indentation -Wno-maybe-uninitialized -Wundef
-Wpointer-arith -Wmissing-format-attribute -Wformat-security -Wcast-align
-Wno-tautological-compare -fasynchronous-unwind-tables -fdebug-types-section
-g1 -O2 -ffile-prefix-map=/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0=.
-specs=/usr/share/dpkg/pie-compile.specs -fstack-protector-strong -Wformat
-Werror=format-security -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -DNDEBUG
-DG_DISABLE_CAST_CHECKS -fno-strict-aliasing -fno-exceptions -fno-rtti
-fcoroutines -ffunction-sections -fdata-sections -fPIC -fvisibility=hidden
-ffp-contract=off -fstrict-aliasing -Wno-attributes -Wno-cast-align
-Wno-dangling-reference -Wno-deprecated -Wno-psabi
-Wno-suggest-attribute=format -Wno-undef -Wno-uninitialized
-Wno-unused-parameter -std=c++23 -MD -MT
Source/ThirdParty/skia/CMakeFiles/Skia.dir/src/core/SkCubicMap.cpp.o -MF
Source/ThirdParty/skia/CMakeFiles/Skia.dir/src/core/SkCubicMap.cpp.o.d -o
Source/ThirdParty/skia/CMakeFiles/Skia.dir/src/core/SkCubicMap.cpp.o -c
/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0/Source/ThirdParty/skia/src/core/SkCubicMap.cpp
/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0/Source/ThirdParty/skia/src/core/SkCubicMap.cpp:
In constructor 'SkCubicMap::SkCubicMap(SkPoint, SkPoint)':
/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0/Source/ThirdParty/skia/src/core/SkCubicMap.cpp:106:1:
error: unable to find a register to spill
106 | }
| ^
/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0/Source/ThirdParty/skia/src/core/SkCubicMap.cpp:106:1:
error: this is the insn:
(insn 34 307 35 8 (parallel [
(set (reg:SF 170 [ prephitmp_18 ])
(reg:SF 335))
(use (reg:SI 154 fpscr0))
]) "/usr/lib/gcc-snapshot/include/c++/15/bits/stl_algobase.h":262:15
222 {movsf_ie_ra}
(expr_list:REG_DEAD (reg:SF 335)
(nil)))
during RTL pass: reload
/home/glaubitz/webkit2gtk-sh4/webkit2gtk-2.46.0/Source/ThirdParty/skia/src/core/SkCubicMap.cpp:106:1:
internal compiler error: in lra_split_hard_reg_for, at lra-assigns.cc:1868
0x2b7c113f __libc_start_call_main
../sysdeps/nptl/libc_start_call_main.h:58
0x2b7c1223 __libc_start_main_impl
./csu/libc-start.c:360
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-snapshot/README.Bugs> for instructions.
I am going to retest this with Kaz's tree which I am currently building.
While provide the preprocessed source in a follow-up comment.
