From: Richard Kenner <kenner@gcc.gnu.org>
Date: Tue, 3 Nov 1992 19:57:52 +0000 (-0500)
Subject: (jump_optimize): Ensure operand of REG_NOTES is an INSN; otherwise, we
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a8fc41afdd494825e0df0225a1e60f23a43f309a;p=gcc.git

(jump_optimize): Ensure operand of REG_NOTES is an INSN; otherwise, we
might try to read outside allocated memory.

From-SVN: r2684
---

diff --git a/gcc/jump.c b/gcc/jump.c
index 63f53131115..5ed2828d531 100644
--- a/gcc/jump.c
+++ b/gcc/jump.c
@@ -837,6 +837,7 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
 	      && this_is_condjump && ! this_is_simplejump
 	      && BRANCH_COST >= 3
 	      && (temp = next_nonnote_insn (insn)) != 0
+	      && GET_CODE (temp) == INSN
 	      && REG_NOTES (temp) == 0
 	      && (reallabelprev == temp
 		  || ((temp2 = next_active_insn (temp)) != 0
@@ -874,8 +875,10 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
 	      && this_is_condjump && ! this_is_simplejump
 	      && BRANCH_COST >= 4
 	      && (temp = next_nonnote_insn (insn)) != 0
+	      && GET_CODE (temp) == INSN
 	      && REG_NOTES (temp) == 0
 	      && (temp3 = next_nonnote_insn (temp)) != 0
+	      && GET_CODE (temp3) == INSN
 	      && REG_NOTES (temp3) == 0
 	      && (reallabelprev == temp3
 		  || ((temp2 = next_active_insn (temp3)) != 0
@@ -920,8 +923,10 @@ jump_optimize (f, cross_jump, noop_moves, after_regscan)
 	      && this_is_condjump && ! this_is_simplejump
 	      && BRANCH_COST >= 4
 	      && (temp = next_nonnote_insn (insn)) != 0
+	      && GET_CODE (temp) == INSN
 	      && REG_NOTES (temp) == 0
 	      && (temp3 = next_nonnote_insn (temp)) != 0
+	      && GET_CODE (temp3) == INSN
 	      && REG_NOTES (temp3) == 0
 	      && (reallabelprev == temp3
 		  || ((temp2 = next_active_insn (temp3)) != 0