From: Richard Henderson <rth@redhat.com>
Date: Tue, 22 Mar 2011 16:02:59 +0000 (-0700)
Subject: * dwarf2out.c (dwarf2out_frame_debug_expr) [rule 11]: Handle post_dec.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d090a5aa09a5e837bc576dcab89cda8bbcd63d78;p=gcc.git

* dwarf2out.c (dwarf2out_frame_debug_expr) [rule 11]: Handle post_dec.

From-SVN: r171296
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 396c8be7a84..3fff7d69741 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -16,6 +16,8 @@
 	(*pushhi, *pushsi, *pushsf, popqi): Likewise.
 	(pophi): Remove.
 
+	* dwarf2out.c (dwarf2out_frame_debug_expr) [rule 11]: Handle post_dec.
+
 2011-03-22  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* tree.c (build_call_1): New function.
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 5d64b8d3fb9..32ffe1b6d62 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -2239,7 +2239,7 @@ dwarf2out_frame_debug_cfa_restore (rtx reg, const char *label)
 	   cfa.base_offset = -cfa_store.offset
 
   Rule 11:
-  (set (mem ({pre_inc,pre_dec} sp:cfa_store.reg)) <reg>)
+  (set (mem ({pre_inc,pre_dec,post_dec} sp:cfa_store.reg)) <reg>)
   effects: cfa_store.offset += -/+ mode_size(mem)
 	   cfa.offset = cfa_store.offset if cfa.reg == sp
 	   cfa.reg = sp
@@ -2258,7 +2258,7 @@ dwarf2out_frame_debug_cfa_restore (rtx reg, const char *label)
 	   cfa.base_offset = -{cfa_store,cfa_temp}.offset
 
   Rule 14:
-  (set (mem (postinc <reg1>:cfa_temp <const_int>)) <reg2>)
+  (set (mem (post_inc <reg1>:cfa_temp <const_int>)) <reg2>)
   effects: cfa.reg = <reg1>
 	   cfa.base_offset = -cfa_temp.offset
 	   cfa_temp.offset -= mode_size(mem)
@@ -2591,6 +2591,7 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
 	  /* Rule 11 */
 	case PRE_INC:
 	case PRE_DEC:
+	case POST_DEC:
 	  offset = GET_MODE_SIZE (GET_MODE (dest));
 	  if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
 	    offset = -offset;
@@ -2615,7 +2616,10 @@ dwarf2out_frame_debug_expr (rtx expr, const char *label)
 	  if (cfa.reg == STACK_POINTER_REGNUM)
 	    cfa.offset = cfa_store.offset;
 
-	  offset = -cfa_store.offset;
+	  if (GET_CODE (XEXP (dest, 0)) == POST_DEC)
+	    offset += -cfa_store.offset;
+	  else
+	    offset = -cfa_store.offset;
 	  break;
 
 	  /* Rule 12 */