https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81426
--- Comment #11 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- Created attachment 56123 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56123&action=edit Preprocessed source from building GHC with gcc-13 This is still present in gcc-13, I just ran into it while cross-building the Haskell compiler GHC for sh4: "inplace/bin/ghc-stage1" -optc-Wall -optc-Wall -optc-Wextra -optc-Wstrict-prototypes -optc-Wmissing-prototypes -optc-Wmissing-declarations -optc-Winline -optc-Wpointer-ari th -optc-Wmissing-noreturn -optc-Wnested-externs -optc-Wredundant-decls -optc-Wno-aggregate-return -optc-Wno-unused-label -optc-DNOSMP -optc-fno-strict-aliasing -optc-fno- common -optc-Irts/dist-install/build/./autogen -optc-Irts/include/../dist-install/build/include -optc-Irts/include/. -optc-Irts/. -optc-DCOMPILING_RTS -optc-DFS_NAMESPACE= rts -optc-Werror=unused-but-set-variable -optc-Wno-error=inline -optc-O2 -optc-fomit-frame-pointer -optc-g -optc-fno-omit-frame-pointer -optc-O0 -optc-g3 -optc-DRtsWay=\"r ts_thr_debug\" -optc-ffunction-sections -optc-fdata-sections -static -optc-DTHREADED_RTS -optc-DDEBUG -H32m -O -lffi -optl-pthread -O0 -H64m -Wall -this-unit-id rts -opt c-DNOSMP -dcmm-lint -package-env - -i -irts -irts/dist-install/build -Irts/dist-install/build -irts/dist-install/build/./autogen -Irts/dist-install/build/./autogen -Ir ts/include/../dist-install/build/include -Irts/include/. -Irts/. -optP-DCOMPILING_RTS -optP-DFS_NAMESPACE=rts -O2 -Wcpp-undef -O0 -Wnoncanonical-monad-instances -c rts/ProfilerReport.c -o rts/dist-install/build/ProfilerReport.thr_debug_o rts/sm/NonMovingMark.c: In function ‘mark_closure’: rts/sm/NonMovingMark.c:1763:1: error: error: unable to find a register to spill in class ‘R0_REGS’ 1763 | } | ^ | 1763 | } | ^ rts/sm/NonMovingMark.c:1763:1: error: error: this is the insn: | 1763 | } | ^ (insn 1553 3768 1554 115 (parallel [ (set (subreg:SI (reg:QI 7 r7 [803]) 0) (unspec_volatile:SI [ (mem/v:QI (reg/f:SI 3 r3 [orig:299 _160 ] [299]) [-1 S1 A8]) (reg:QI 800 [ MEM[(struct StgStack *)_313].marking ]) (reg:QI 5 r5 [orig:802 nonmovingMarkEpoch ] [802]) ] UNSPECV_CMPXCHG_1)) (set (mem/v:QI (reg/f:SI 3 r3 [orig:299 _160 ] [299]) [-1 S1 A8]) (unspec_volatile:QI [ (const_int 0 [0]) ] UNSPECV_CMPXCHG_2)) (set (reg:SI 147 t) (unspec_volatile:SI [ (const_int 0 [0]) ] UNSPECV_CMPXCHG_3)) (clobber (scratch:SI)) (clobber (reg:SI 0 r0)) (clobber (reg:SI 1 r1)) ]) "rts/include/stg/SMP.h":325:0: error: 5 405 {atomic_compare_and_swapqi_soft_gusa} (expr_list:REG_DEAD (reg:QI 5 r5 [orig:802 nonmovingMarkEpoch ] [802]) (expr_list:REG_DEAD (reg:QI 800 [ MEM[(struct StgStack *)_313].marking ]) (expr_list:REG_DEAD (reg/f:SI 3 r3 [orig:299 _160 ] [299]) (expr_list:REG_UNUSED (reg:SI 147 t) (expr_list:REG_UNUSED (reg:SI 1 r1) (expr_list:REG_UNUSED (reg:SI 0 r0) (nil)))))))) rts/sm/NonMovingMark.c:1763:0: error: confused by earlier errors, bailing out | 1763 | } | ^ Attaching the preprocessed source for that.
