Hi Andrew, On Fri, 2023-05-05 08:17:19 -0700, Andrew Pinski via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > While looking into a different issue, I noticed that it > would take until the second forwprop pass to do some > forward proping and it was because the ssa name was > used more than once but the second statement was > "dead" and we don't remove that until much later. [...] > OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
Since this patch, I see a bit of fallout building the Linux kernel
using the adder875_defconfig:
# CC arch/powerpc/kernel/ptrace/ptrace-view.o
powerpc-linux-gcc -Wp,-MMD,arch/powerpc/kernel/ptrace/.ptrace-view.o.d
-nostdinc -I./arch/powerpc/include -I./arch/powerpc/include/generated
-I./include -I./arch/powerpc/include/uapi
-I./arch/powerpc/include/generated/uapi -I./include/uapi
-I./include/generated/uapi -include ./include/linux/compiler-version.h -include
./include/linux/kconfig.h -include ./include/linux/compiler_types.h
-D__KERNEL__ -I ./arch/powerpc -fmacro-prefix-map=./= -Wall -Wundef
-Werror=strict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-fshort-wchar -fno-PIE -Werror=implicit-function-declaration
-Werror=implicit-int -Werror=return-type -Wno-format-security -funsigned-char
-std=gnu11 -mbig-endian -m32 -msoft-float -pipe -ffixed-r2 -mmultiple
-mno-readonly-in-sdata -mcpu=860 -mno-prefixed -mno-pcrel -mno-altivec -mno-vsx
-mno-mma -fno-asynchronous-unwind-tables -mno-string -mbig-endian
-mstack-protector-guard=tls -mstack-protector-guard-reg=r2
-fno-delete-null-pointer-checks -Wno-frame-address -Wno-format-truncation
-Wno-format-overflow -Wno-address-of-packed-member -O2
-fno-allow-store-data-races -Wframe-larger-than=1024 -fstack-protector-strong
-Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable
-Wno-dangling-pointer -fomit-frame-pointer -ftrivial-auto-var-init=zero
-fno-stack-clash-protection -Wdeclaration-after-statement -Wvla
-Wno-pointer-sign -Wcast-function-type -Wno-stringop-truncation
-Wno-stringop-overflow -Wno-restrict -Wno-maybe-uninitialized -Wno-array-bounds
-Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -fno-strict-overflow
-fno-stack-check -fconserve-stack -Werror=date-time
-Werror=incompatible-pointer-types -Werror=designated-init
-Wno-packed-not-aligned -g -mstack-protector-guard-offset=544 -Werror
-DUTS_MACHINE='"ppc"'
-DKBUILD_MODFILE='"arch/powerpc/kernel/ptrace/ptrace-view"'
-DKBUILD_BASENAME='"ptrace_view"' -DKBUILD_MODNAME='"ptrace_view"'
-D__KBUILD_MODNAME=kmod_ptrace_view -c -o
arch/powerpc/kernel/ptrace/ptrace-view.o
arch/powerpc/kernel/ptrace/ptrace-view.c
during GIMPLE pass: pre
arch/powerpc/kernel/ptrace/ptrace-view.c: In function 'gpr32_set_common':
arch/powerpc/kernel/ptrace/ptrace-view.c:649:5: internal compiler error: in
gimple_redirect_edge_and_branch, at tree-cfg.cc:6262
649 | int gpr32_set_common(struct task_struct *target,
| ^~~~~~~~~~~~~~~~
0x1a562a6 internal_error(char const*, ...)
???:0
0x826ea1 fancy_abort(char const*, int, char const*)
???:0
0x9b77c9 redirect_edge_and_branch(edge_def*, basic_block_def*)
???:0
0x9b7e43 split_edge(edge_def*)
???:0
0xee1cc7 split_critical_edges(bool)
???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
make[4]: *** [scripts/Makefile.build:252:
arch/powerpc/kernel/ptrace/ptrace-view.o] Error 1
make[3]: *** [scripts/Makefile.build:494: arch/powerpc/kernel/ptrace] Error 2
make[2]: *** [scripts/Makefile.build:494: arch/powerpc/kernel] Error 2
make[1]: *** [scripts/Makefile.build:494: arch/powerpc] Error 2
make: *** [Makefile:2026: .] Error 2
(Full log at
http://toolchain.lug-owl.de/laminar/jobs/linux-powerpc-adder875_defconfig/100)
Thanks,
Jan-Benedict
--
signature.asc
Description: PGP signature
