From e978d62ee6039fd2daa8a0f1acdcef80d441cec6 Mon Sep 17 00:00:00 2001
From: Paul Brook <paul@codesourcery.com>
Date: Wed, 18 Feb 2004 12:33:18 +0000
Subject: [PATCH] rtlanal.c (rtx_varies_p): Return 0 for NULL_RTX
* rtlanal.c (rtx_varies_p): Return 0 for NULL_RTX
testsuite/
* gcc.c-torture/compile/libcall-1.c: New test.
From-SVN: r78027
---
gcc/ChangeLog | 4 ++++
gcc/rtlanal.c | 6 +++++-
gcc/testsuite/ChangeLog | 4 ++++
gcc/testsuite/gcc.c-torture/compile/libcall-1.c | 14 ++++++++++++++
4 files changed, 27 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.c-torture/compile/libcall-1.c
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4e4dcd760990..8b1e5663613d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2004-02-18 Paul Brook <paul@codesourcery.com>
+
+ * rtlanal.c (rtx_varies_p): Return 0 for NULL_RTX
+
2004-02-18 Paul Brook <paul@codesourcery.com>
PR debug/12934
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index c408521e4888..f643dfe192a3 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -134,10 +134,14 @@ rtx_unstable_p (rtx x)
int
rtx_varies_p (rtx x, int for_alias)
{
- RTX_CODE code = GET_CODE (x);
+ RTX_CODE code;
int i;
const char *fmt;
+ if (!x)
+ return 0;
+
+ code = GET_CODE (x);
switch (code)
{
case MEM:
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c343a6401581..3bacb3bef04d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2004-02-18 Paul Brook <paul@codesourcery.com>
+
+ * gcc.c-torture/compile/libcall-1.c: New test.
+
2004-02-18 Paul Brook <paul@codesourcery.com>
PR debug/12934
diff --git a/gcc/testsuite/gcc.c-torture/compile/libcall-1.c b/gcc/testsuite/gcc.c-torture/compile/libcall-1.c
new file mode 100644
index 000000000000..c1b1cfc61395
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/libcall-1.c
@@ -0,0 +1,14 @@
+/* Failed on ARM because rtx_varies_p didn't like the REG_EQUAL notes
+ generated for libcalls.
+ http://gcc.gnu.org/ml/gcc-patches/2004-02/msg01518.html */
+static const char digs[] = "0123456789ABCDEF";
+int __attribute__((pure)) bar();
+
+int foo (int i)
+{
+ int len;
+ if (i)
+ return 0;
+ len = bar();
+ return digs[len];
+}
--
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