From 984179689f29e1a1d257e1aa63bdaca9c0ec89b2 Mon Sep 17 00:00:00 2001
From: Danny Smith <dannysmith@users.sourceforge.net>
Date: Thu, 9 Jan 2003 02:34:52 +0000
Subject: [PATCH] re PR rtl-optimization/8750 (Cygwin prolog generation
erroneously emitting __alloca as regular function call)
PR optimization/8750
* config/i386/i386.c (ix86_expand_prologue): Don't allow
scheduling pass to move insns across __alloca call.
From-SVN: r61068
---
gcc/ChangeLog | 6 ++++++
gcc/config/i386/i386.c | 4 ++++
2 files changed, 10 insertions(+)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0d795daa8f51..874920c2d93c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2003-01-08 Danny Smith <dannysmith@users.sourceforge.net>
+
+ PR optimization/8750
+ * config/i386/i386.c (ix86_expand_prologue): Don't allow
+ scheduling pass to move insns across __alloca call.
+
2003-01-08 Dale Johannesen <dalej@apple.com>
* config/rs6000/rs6000.md: Replace *store_multiple_string
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index c8d02a4fb23b..64618f83cf4c 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4800,6 +4800,10 @@ ix86_expand_prologue ()
CALL_INSN_FUNCTION_USAGE (insn)
= gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_USE (VOIDmode, arg0),
CALL_INSN_FUNCTION_USAGE (insn));
+
+ /* Don't allow scheduling pass to move insns across __alloca
+ call. */
+ emit_insn (gen_blockage (const0_rtx));
}
if (use_mov)
{