Eric Botcazou <ebotca...@adacore.com> writes: > This fixes a somewhat obscure interaction between alloca and setjmp/longjmp > in > PIC mode on the SPARC architecture. The problem is that the canonical PIC > register on SPARC (%l7) is call-saved like on other architectures but, unlike > on other architectures, not (always) preserved by setjmp. There is a note in > the SCD about this quirk of setjmp so we must probably live with it. > > Tested on SPARC64/Linux and SPARC/Solaris, applied on the mainline. > > > 2018-01-12 Eric Botcazou <ebotca...@adacore.com> > > PR target/83368 > * config/sparc/sparc.h (PIC_OFFSET_TABLE_REGNUM): Set to INVALID_REGNUM > in PIC mode except for TARGET_VXWORKS_RTP. > * config/sparc/sparc.c: Include cfgrtl.h. > (TARGET_INIT_PIC_REG): Define. > (TARGET_USE_PSEUDO_PIC_REG): Likewise. > (sparc_pic_register_p): New predicate. > (sparc_legitimate_address_p): Use it. > (sparc_legitimize_pic_address): Likewise. > (sparc_delegitimize_address): Likewise. > (sparc_mode_dependent_address_p): Likewise. > (gen_load_pcrel_sym): Remove 4th parameter. > (load_got_register): Adjust call to above. Remove obsolete stuff. > (sparc_expand_prologue): Do not call load_got_register here. > (sparc_flat_expand_prologue): Likewise. > (sparc_output_mi_thunk): Set the pic_offset_table_rtx object. > (sparc_use_pseudo_pic_reg): New function. > (sparc_init_pic_reg): Likewise. > * config/sparc/sparc.md (vxworks_load_got): Set the GOT register. > (builtin_setjmp_receiver): Enable only for TARGET_VXWORKS_RTP. > > > 2018-01-12 Eric Botcazou <ebotca...@adacore.com> > > * gcc.target/sparc/setjmp-1.c: New test.
I think this caused: .././src/gcc/config/sparc/sparc.md: In function ‘rtx_def* gen_vxworks_load_got()’: .././src/gcc/config/sparc/sparc.md:1811:17: error: ‘global_offset_table_rtx’ was not declared in this scope operands[0] = global_offset_table_rtx; on sparc-wrs-vxworks. (Might already have been reported, sorry.) Thanks, Richard
