[PATCH 08/12] ia64: Use pc_rtx to save the return address.
Richard Henderson
rth@redhat.com
Wed Jun 29 22:27:00 GMT 2011
When actually emitting dwarf2, this now produces proper results.
When emitting ia64 unwind info, this removes a hard-coded assumption.
---
gcc/config/ia64/ia64.c | 17 ++++++++++-------
1 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c
index bb3fc4d..b37919c 100644
--- a/gcc/config/ia64/ia64.c
+++ b/gcc/config/ia64/ia64.c
@@ -3444,7 +3444,8 @@ ia64_expand_prologue (void)
reg_emitted (reg_save_b0);
insn = emit_move_insn (alt_reg, reg);
RTX_FRAME_RELATED_P (insn) = 1;
- add_reg_note (insn, REG_CFA_REGISTER, NULL_RTX);
+ add_reg_note (insn, REG_CFA_REGISTER,
+ gen_rtx_SET (VOIDmode, alt_reg, pc_rtx));
/* Even if we're not going to generate an epilogue, we still
need to save the register so that EH works. */
@@ -9737,20 +9738,22 @@ process_cfa_register (FILE *asm_out_file, rtx pat, bool unwind)
{
rtx dest = SET_DEST (pat);
rtx src = SET_SRC (pat);
-
int dest_regno = REGNO (dest);
- int src_regno = REGNO (src);
+ int src_regno;
- switch (src_regno)
+ if (src == pc_rtx)
{
- case BR_REG (0):
/* Saving return address pointer. */
- gcc_assert (dest_regno == current_frame_info.r[reg_save_b0]);
if (unwind)
fprintf (asm_out_file, "\t.save rp, r%d\n",
ia64_dbx_register_number (dest_regno));
- break;
+ return;
+ }
+
+ src_regno = REGNO (src);
+ switch (src_regno)
+ {
case PR_REG (0):
gcc_assert (dest_regno == current_frame_info.r[reg_save_pr]);
if (unwind)
--
1.7.5.4
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