From: Jason Merrill <jason@yorick.cygnus.com>
Date: Fri, 12 Dec 1997 06:12:03 +0000 (+0000)
Subject: flow.c (find_basic_blocks): A CALL_INSN that can throw starts a new basic block.
X-Git-Tag: releases/libf2c-0.5.21~385
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=74d7ab557f039cde838e431c610535c57b2476df;p=thirdparty%2Fgcc.git

flow.c (find_basic_blocks): A CALL_INSN that can throw starts a new basic block.

	* flow.c (find_basic_blocks): A CALL_INSN that can throw starts
	a new basic block.
	(find_basic_blocks_1): Likewise.

From-SVN: r17055
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d871668bd96f..a072e14e5091 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Thu Dec 11 22:02:10 1997  Jason Merrill  <jason@yorick.cygnus.com>
+
+	* flow.c (find_basic_blocks): A CALL_INSN that can throw starts
+	a new basic block.
+	(find_basic_blocks_1): Likewise.
+
 Thu Dec 11 21:08:48 1997  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* except.c (use_eh_context): Don't copy_rtx a REG.
diff --git a/gcc/flow.c b/gcc/flow.c
index 90df30a361a4..720886d79d6d 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -304,6 +304,7 @@ flow_analysis (f, nregs, file)
   {
     register RTX_CODE prev_code = JUMP_INSN;
     register RTX_CODE code;
+    int eh_region = 0;
 
     max_uid_for_flow = 0;
 
@@ -316,7 +317,7 @@ flow_analysis (f, nregs, file)
 	    || (GET_RTX_CLASS (code) == 'i'
 		&& (prev_code == JUMP_INSN
 		    || (prev_code == CALL_INSN
-			&& nonlocal_label_list != 0)
+			&& (nonlocal_label_list != 0 || eh_region))
 		    || prev_code == BARRIER)))
 	  i++;
 
@@ -325,6 +326,10 @@ flow_analysis (f, nregs, file)
 
 	if (code != NOTE)
 	  prev_code = code;
+	else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_BEG)
+	  ++eh_region;
+	else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_END)
+	  --eh_region;
       }
   }
 
@@ -418,7 +423,7 @@ find_basic_blocks (f, nonlocal_label_list)
 	       || (GET_RTX_CLASS (code) == 'i'
 		   && (prev_code == JUMP_INSN
 		       || (prev_code == CALL_INSN
-			   && nonlocal_label_list != 0
+			   && (nonlocal_label_list != 0 || eh_note)
 			   && ! find_reg_note (insn, REG_RETVAL, NULL_RTX))
 		       || prev_code == BARRIER)))
 	{