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Fix an unwinding bug for functions with dynamic stack frames. 

2012-04-06  Walter Lee  <walt@tilera.com>

	Backport from mainline
	2012-03-07  Walter Lee  <walt@tilera.com>

	* config/tilegx/tilegx.c (tilegx_expand_prologue): Don't generate
	REG_CFA_* notes for the stack pointer.
	(tilegx_expand_epilogue): Restore stack pointer by adjusting it by
	EH_RETURN_STACKADJ_RTX.
	* config/tilepro/tilepro.c (tilepro_expand_prologue): Don't
	generate REG_CFA_* notes for the stack pointer.
	(tilepro_expand_epilogue): Restore stack pointer by adjusting it
	by EH_RETURN_STACKADJ_RTX.

From-SVN: r186195
This commit is contained in:
Walter Lee 2012-04-06 15:06:53 +00:00 committed by Walter Lee
parent 6b8fa44f0a
commit ebff895c9a
3 changed files with 38 additions and 30 deletions
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14
gcc/ChangeLog
View File

@ -1,3 +1,17 @@
2012-04-06 Walter Lee <walt@tilera.com>
Backport from mainline
2012-03-07 Walter Lee <walt@tilera.com>
* config/tilegx/tilegx.c (tilegx_expand_prologue): Don't generate
REG_CFA_* notes for the stack pointer.
(tilegx_expand_epilogue): Restore stack pointer by adjusting it by
EH_RETURN_STACKADJ_RTX.
* config/tilepro/tilepro.c (tilepro_expand_prologue): Don't
generate REG_CFA_* notes for the stack pointer.
(tilepro_expand_epilogue): Restore stack pointer by adjusting it
by EH_RETURN_STACKADJ_RTX.
2012-04-06 Matt Turner <mattst88@gmail.com>
* doc/install.texi: Correct typo "-mno-lsc" -> "-mno-llsc".

30
gcc/config/tilegx/tilegx.c
View File

@ -3881,9 +3881,8 @@ tilegx_expand_prologue (void)
{
/* Copy the old stack pointer aside so we can save it later. */
sp_copy_regno = next_scratch_regno--;
insn = FRP (emit_move_insn (gen_rtx_REG (Pmode, sp_copy_regno),
stack_pointer_rtx));
add_reg_note (insn, REG_CFA_REGISTER, NULL_RTX);
emit_move_insn (gen_rtx_REG (Pmode, sp_copy_regno),
stack_pointer_rtx);
}
if (tilegx_current_function_is_leaf ())
@ -3925,8 +3924,8 @@ tilegx_expand_prologue (void)
}
/* Save our frame pointer for backtrace chaining. */
FRP (frame_emit_store (sp_copy_regno, STACK_POINTER_REGNUM,
chain_addr, cfa, cfa_offset));
emit_insn (gen_movdi (gen_frame_mem (DImode, chain_addr),
gen_rtx_REG (DImode, sp_copy_regno)));
}
/* Compute where to start storing registers we need to save. */
@ -4067,16 +4066,7 @@ tilegx_expand_epilogue (bool sibcall_p)
emit_insn (gen_blockage ());
if (crtl->calls_eh_return)
{
rtx r = compute_frame_addr (-total_size + UNITS_PER_WORD,
&next_scratch_regno);
insn = emit_move_insn (gen_lowpart (DImode, stack_pointer_rtx),
gen_frame_mem (DImode, r));
RTX_FRAME_RELATED_P (insn) = 1;
REG_NOTES (insn) = cfa_restores;
}
else if (frame_pointer_needed)
if (frame_pointer_needed)
{
/* Restore the old stack pointer by copying from the frame
pointer. */
@ -4100,6 +4090,16 @@ tilegx_expand_epilogue (bool sibcall_p)
cfa_restores);
}
if (crtl->calls_eh_return)
{
if (TARGET_32BIT)
emit_insn (gen_sp_adjust_32bit (stack_pointer_rtx, stack_pointer_rtx,
EH_RETURN_STACKADJ_RTX));
else
emit_insn (gen_sp_adjust (stack_pointer_rtx, stack_pointer_rtx,
EH_RETURN_STACKADJ_RTX));
}
/* Restore the old frame pointer. */
if (frame_pointer_needed)
{

24
gcc/config/tilepro/tilepro.c
View File

@ -3556,9 +3556,8 @@ tilepro_expand_prologue (void)
{
/* Copy the old stack pointer aside so we can save it later. */
sp_copy_regno = next_scratch_regno--;
insn = FRP (emit_move_insn (gen_rtx_REG (Pmode, sp_copy_regno),
stack_pointer_rtx));
add_reg_note (insn, REG_CFA_REGISTER, NULL_RTX);
emit_move_insn (gen_rtx_REG (Pmode, sp_copy_regno),
stack_pointer_rtx);
}
if (tilepro_current_function_is_leaf ())
@ -3600,8 +3599,8 @@ tilepro_expand_prologue (void)
}
/* Save our frame pointer for backtrace chaining. */
FRP (frame_emit_store (sp_copy_regno, STACK_POINTER_REGNUM,
chain_addr, cfa, cfa_offset));
emit_insn (gen_movsi (gen_frame_mem (SImode, chain_addr),
gen_rtx_REG (SImode, sp_copy_regno)));
}
/* Compute where to start storing registers we need to save. */
@ -3742,16 +3741,7 @@ tilepro_expand_epilogue (bool sibcall_p)
emit_insn (gen_blockage ());
if (crtl->calls_eh_return)
{
rtx r = compute_frame_addr (-total_size + UNITS_PER_WORD,
&next_scratch_regno);
insn = emit_move_insn (gen_rtx_REG (Pmode, STACK_POINTER_REGNUM),
gen_frame_mem (Pmode, r));
RTX_FRAME_RELATED_P (insn) = 1;
REG_NOTES (insn) = cfa_restores;
}
else if (frame_pointer_needed)
if (frame_pointer_needed)
{
/* Restore the old stack pointer by copying from the frame
pointer. */
@ -3767,6 +3757,10 @@ tilepro_expand_epilogue (bool sibcall_p)
cfa_restores);
}
if (crtl->calls_eh_return)
emit_insn (gen_sp_adjust (stack_pointer_rtx, stack_pointer_rtx,
EH_RETURN_STACKADJ_RTX));
/* Restore the old frame pointer. */
if (frame_pointer_needed)
{