From 9d3493e63d87f3cbd0c3caab3b429583f8b6c7b6 Mon Sep 17 00:00:00 2001
From: Sandra Loosemore <sandra@codesourcery.com>
Date: Thu, 22 Jul 2010 22:18:07 -0400
Subject: [PATCH] re PR tree-optimization/39839 (loop invariant motion causes
stack spill)
2010-07-22 Sandra Loosemore <sandra@codesourcery.com>
PR tree-optimization/39839
gcc/testsuite/
* gcc.target/arm/pr39839.c: New test case.
From-SVN: r162438
---
gcc/testsuite/ChangeLog | 5 +++++
gcc/testsuite/gcc.target/arm/pr39839.c | 24 ++++++++++++++++++++++++
2 files changed, 29 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/arm/pr39839.c
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ecb1efb9eb4d..dfcd727337db 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-22 Sandra Loosemore <sandra@codesourcery.com>
+
+ PR tree-optimization/39839
+ * gcc.target/arm/pr39839.c: New test case.
+
2010-07-22 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/unchecked_convert5b.adb: New test.
diff --git a/gcc/testsuite/gcc.target/arm/pr39839.c b/gcc/testsuite/gcc.target/arm/pr39839.c
new file mode 100644
index 000000000000..31e865af2f55
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/pr39839.c
@@ -0,0 +1,24 @@
+/* { dg-options "-mthumb -Os -march=armv5te -mthumb-interwork -fpic" } */
+/* { dg-require-effective-target arm_thumb1_ok } */
+/* { dg-final { scan-assembler-not "str\[\\t \]*r.,\[\\t \]*.sp," } } */
+
+struct S
+{
+ int count;
+ char *addr;
+};
+
+void func(const char*, const char*, int, const char*);
+
+/* This function should not need to spill to the stack. */
+void test(struct S *p)
+{
+ int off = p->count;
+ while (p->count >= 0)
+ {
+ const char *s = "xyz";
+ if (*p->addr) s = "pqr";
+ func("abcde", p->addr + off, off, s);
+ p->count--;
+ }
+}
--
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