diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 3f32754..3463ffb 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -1137,15 +1137,20 @@ expand_builtin_longjmp (rtx buf_addr, rtx value) emit_insn (targetm.gen_nonlocal_goto (value, lab, stack, fp)); else { - lab = copy_to_reg (lab); - emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); + lab = copy_to_reg (lab); + /* Restore the frame pointer and stack pointer. We must use a temporary since the setjmp buffer may be a local. */ fp = copy_to_reg (fp); emit_stack_restore (SAVE_NONLOCAL, stack); + + /* Ensure the frame pointer move is not optimized. */ + emit_insn (gen_blockage ()); + emit_clobber (hard_frame_pointer_rtx); + emit_clobber (frame_pointer_rtx); emit_move_insn (hard_frame_pointer_rtx, fp); emit_use (hard_frame_pointer_rtx); @@ -1284,15 +1289,20 @@ expand_builtin_nonlocal_goto (tree exp) emit_insn (targetm.gen_nonlocal_goto (const0_rtx, r_label, r_sp, r_fp)); else { - r_label = copy_to_reg (r_label); - emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); + r_label = copy_to_reg (r_label); + /* Restore the frame pointer and stack pointer. We must use a temporary since the setjmp buffer may be a local. */ r_fp = copy_to_reg (r_fp); emit_stack_restore (SAVE_NONLOCAL, r_sp); + + /* Ensure the frame pointer move is not optimized. */ + emit_insn (gen_blockage ()); + emit_clobber (hard_frame_pointer_rtx); + emit_clobber (frame_pointer_rtx); emit_move_insn (hard_frame_pointer_rtx, r_fp); /* USE of hard_frame_pointer_rtx added for consistency; |