https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212
--- Comment #339 from John Paul Adrian Glaubitz <glaubitz at physik dot
fu-berlin.de> ---
(In reply to John Paul Adrian Glaubitz from comment #335)
> (In reply to Kazumoto Kojima from comment #334)
> > Created attachment 59216 [details]
> > a patch to fix ICE in c#331
> >
> > The patch preallocates R0 for those Sid memory patterns so as to shorten the
> > live range of R0. Tested target libgcc and libstdc++v3 build and c
> > testsuilte only.
>
> Thanks a lot. I'll give it a try.
>
> FWIW, the backend has improved quite a lot over the past weeks. The
> Dreamcast people reported good results as well!
I can confirm that the patch from comment #334 fixes the problem and the build
of WebKit now proceeds much further than it used to in the past for a long
time.
I have not observed any more issues with register spilling, but it seems that I
have uncovered a miscompilation bug which leads to the generation of invalid
assembler:
/usr/bin/g++-15 -DBUILDING_GTK__=1 -DBUILDING_JavaScriptCore
-DBUILDING_WEBKIT=1 -DBUILDING_WITH_CMAKE=1 -DGETTEXT_PACKAGE=\"WebKitGTK-4.1\"
-DHAVE_CONFIG_H=1 -DJSC_GLIB_API_ENABLED -DJavaScriptCore_EXPORTS
-DPAS_BMALLOC=1 -DSTATICALLY_LINKED_WITH_WTF
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCore/Headers
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/API
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/assembler
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/b3
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/b3/air
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/bindings
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/builtins
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/bytecode
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/bytecompiler
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/dfg
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/disassembler
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/disassembler/ARM64
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/disassembler/zydis/Zydis
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/domjit
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/ftl
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/fuzzilli
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/heap
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/debugger
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/inspector
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/inspector/agents
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/inspector/augmentable
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/inspector/remote
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/interpreter
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/jit
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/llint
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/parser
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/profiler
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/runtime
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/tools
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/wasm
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/wasm/js
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/yarr
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCore/DerivedSources
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCore/DerivedSources/inspector
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCore/DerivedSources/runtime
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCore/DerivedSources/yarr
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/API/glib
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCoreGLib/DerivedSources
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCoreGLib/DerivedSources/jsc
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCoreGLib/Headers
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/Source/JavaScriptCore/inspector/remote/glib
-I/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/WTF/Headers
-isystem /usr/include/glib-2.0 -isystem /usr/lib/sh4-linux-gnu/glib-2.0/include
-isystem /usr/include/sysprof-6 -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-new-new/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 -pthread -std=c++23 -MD -MT
Source/JavaScriptCore/CMakeFiles/JavaScriptCore.dir/__/__/JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-f2e18ffc-36.cpp.o
-MF
Source/JavaScriptCore/CMakeFiles/JavaScriptCore.dir/__/__/JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-f2e18ffc-36.cpp.o.d
-o
Source/JavaScriptCore/CMakeFiles/JavaScriptCore.dir/__/__/JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-f2e18ffc-36.cpp.o
-c
/home/glaubitz/webkit2gtk-sh4-new-new/webkit2gtk-2.46.0/build-soup3/JavaScriptCore/DerivedSources/unified-sources/UnifiedSource-f2e18ffc-36.cpp
(...)
{standard input}: Assembler messages:
{standard input}:6139: Error: syntax error in @(disp,[Rn, gbr, pc])
{standard input}:6139: Error: invalid operands for opcode
{standard input}:54249: Error: syntax error in @(disp,[Rn, gbr, pc])
{standard input}:54249: Error: invalid operands for opcode
{standard input}:59575: Error: syntax error in @(disp,[Rn, gbr, pc])
{standard input}:59575: Error: invalid operands for opcode
{standard input}:61031: Error: syntax error in @(disp,[Rn, gbr, pc])
{standard input}:61031: Error: invalid operands for opcode
I will upload the preprocessed source in the next comment.
