diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 5befd42..630cd25 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -909,6 +909,20 @@ expand_builtin_nonlocal_goto (tree exp) not clear if really needed. */ emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx)); emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx)); + + /* If the architecture is using a GP register, we must + conservatively assume that the target function makes use of it. + The prologue of functions with nonlocal gotos must therefore + initialize the GP register to the appropriate value, and we + must then make sure that this value is live at the point + of the jump. (Note that this doesn't necessarily apply + to targets with a nonlocal_goto pattern; they are free + to implement it in their own way. Note also that this is + a no-op if the GP register is a global invariant.) */ + if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM + && fixed_regs[PIC_OFFSET_TABLE_REGNUM]) + emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); + emit_indirect_jump (r_label); } |