From: bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 10 Nov 2000 10:44:42 +0000 (+0000)
Subject: Fix REG_INC note handling in register renamer.
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=47dcd064882525904b9849607675e10fb09fa33b;p=thirdparty%2Fgcc.git

Fix REG_INC note handling in register renamer.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@37364 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b8625b7691a3..4ff995ebf111 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2000-11-09  Bernd Schmidt  <bernds@redhat.co.uk>
+
+	* regrename.c (build_def_use): Mark contents of REG_INC notes as
+	needing replacement.
+
 2000-11-09  Jan van Male  <jan.vanmale@fenk.wau.nl>
 
         * c-tree.texi: Fix typos.
diff --git a/gcc/regrename.c b/gcc/regrename.c
index 5078585647ee..b3aa6c2f32a8 100644
--- a/gcc/regrename.c
+++ b/gcc/regrename.c
@@ -714,10 +714,15 @@ build_def_use (bb, regs_used)
 		scan_rtx (insn, loc, class, mark_read, type);
 	    }
 
-	  /* Step 4: Close chains for registers that die here.  */
+	  /* Step 4: Close chains for registers that die here.
+	     Also record updates for REG_INC notes.  */
 	  for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
-	    if (REG_NOTE_KIND (note) == REG_DEAD)
-	      scan_rtx (insn, &XEXP (note, 0), NO_REGS, terminate_dead, OP_IN);
+	    {
+	      if (REG_NOTE_KIND (note) == REG_DEAD)
+		scan_rtx (insn, &XEXP (note, 0), NO_REGS, terminate_dead, OP_IN);
+	      else if (REG_NOTE_KIND (note) == REG_INC)
+		scan_rtx (insn, &XEXP (note, 0), ALL_REGS, mark_read, OP_INOUT);
+	    }
 
 	  /* Step 4B: If this is a call, any chain live at this point
 	     requires a caller-saved reg.  */