From a11e0df4da7c987c9627724748fe727183e9379f Mon Sep 17 00:00:00 2001
From: Eric Botcazou <ebotcazou@adacore.com>
Date: Wed, 25 May 2011 11:00:14 +0000
Subject: common.opt (flag_stack_usage_info): New variable.

	* common.opt (flag_stack_usage_info): New variable.
	(-Wstack-usage): New option.
	* doc/invoke.texi (Warning options): Document -Wstack-usage.
	* opts.c (common_handle_option) <OPT_Wstack_usage_>: New case.
	<OPT_fstack_usage>: Likewise.
	* toplev.c (output_stack_usage): Handle -Wstack-usage.
	* calls.c (expand_call): Test flag_stack_usage_info variable instead
	of flag_stack_usage.
	(emit_library_call_value_1): Likewise.
	* explow.c (allocate_dynamic_stack_space): Likewise.
	* function.c (instantiate_virtual_regs ): Likewise.
	(prepare_function_start): Likewise.
	(rest_of_handle_thread_prologue_and_epilogue): Likewise.
	* config/alpha/alpha.c (alpha_expand_prologue): Likewise.
	* config/arm/arm.c (arm_expand_prologue): Likewise.
	(thumb1_expand_prologue): Likewise.
	* config/avr/avr.c (expand_prologue): Likewise.
	* config/i386/i386.c (ix86_expand_prologue): Likewise.
	* config/ia64/ia64.c (ia64_expand_prologue): Likewise.
	* config/m68k/m68k.c (m68k_expand_prologue): Likewise.
	* config/mips/mips.c (mips_expand_prologue): Likewise.
	* config/pa/pa.c (hppa_expand_prologue): Likewise.
	* config/rs6000/rs6000.c (rs6000_emit_prologue): Likewise.
	* config/s390/s390.c (s390_emit_prologue): Likewise.
	* config/sh/sh.c (sh_expand_prologue): Likewise.
	* config/sparc/sparc.c (sparc_expand_prologue): Likewise.
	* config/spu/spu.c (spu_expand_prologue): Likewise.

From-SVN: r174182
---
 gcc/testsuite/gcc.dg/stack-usage-2.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/stack-usage-2.c

(limited to 'gcc/testsuite/gcc.dg/stack-usage-2.c')

diff --git a/gcc/testsuite/gcc.dg/stack-usage-2.c b/gcc/testsuite/gcc.dg/stack-usage-2.c
new file mode 100644
index 0000000..d3c17a8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/stack-usage-2.c
@@ -0,0 +1,33 @@
+/* { dg-do compile } */
+/* { dg-options "-Wstack-usage=512" } */
+
+int foo1 (void)
+{
+  char arr[16];
+  arr[0] = 1;
+  return 0;
+} /* { dg-bogus "stack usage" } */
+
+int foo2 (void)
+{
+  char arr[1024];
+  arr[0] = 1;
+  return 0;
+} /* { dg-warning "stack usage is \[0-9\]* bytes" } */
+
+int foo3 (void)
+{
+  char arr[1024] __attribute__((aligned (512)));
+  arr[0] = 1;
+  /* Force dynamic realignment of argument pointer.  */
+  __builtin_apply ((void (*)()) foo2, 0, 0);
+  return 0;
+
+} /* { dg-warning "stack usage might be \[0-9\]* bytes" } */
+
+int foo4 (int n)
+{
+  char arr[n];
+  arr[0] = 1;
+  return 0;
+} /* { dg-warning "stack usage might be unbounded" } */
-- 
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