gcc-7.3.0HEADgcc-7.3.0master

1 files changed, 78 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/ipa/pure-const-1.c b/gcc/testsuite/gcc.dg/ipa/pure-const-1.c
new file mode 100644
index 0000000000..06b415e0c3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/pure-const-1.c
@@ -0,0 +1,78 @@
+/* { dg-do compile { target nonpic } } */
+/* { dg-options "-O3 -fdump-tree-local-pure-const1 -fdump-ipa-pure-const -fdump-tree-optimized -fno-early-inlining -fgnu89-inline" } */
+void abort (void);
+int error_code;
+static int val;
+__attribute__ ((noinline, noclone))
+static int
+i_am_pure1 (int a)
+{
+  if (a > 50)
+    abort ();
+  return a;
+}
+
+__attribute__ ((noinline, noclone))
+static int
+i_am_const2 (int a)
+{
+  return a+val;
+}
+
+__attribute__ ((noinline, noclone))
+int
+call_me(int a)
+{
+  return a;
+}
+
+inline int
+call_callback(int (*fn)(int), int a)
+{
+  return fn(a);
+}
+
+__attribute__ ((noinline, noclone)) int
+i_am_const3(int a)
+{
+  return call_callback (call_me, a);
+}
+
+__attribute__ ((noinline)) int
+explode_badly()
+{
+  error_code = 0xbad;
+  abort ();
+}
+
+__attribute__ ((noinline, noclone)) int
+i_am_pure4(int a)
+{
+  if (a > 50)
+    explode_badly ();
+  return a;
+}
+
+int
+test()
+{
+  int s;
+  s = i_am_pure1(5);
+  s += i_am_pure1(5);
+  s += i_am_const2(5);
+  s += i_am_const2(5);
+  s += i_am_const3(5);
+  s += i_am_const3(5);
+  s += i_am_pure4(5);
+  s += i_am_pure4(5);
+  return s;
+}
+/* { dg-final { scan-tree-dump-times "i_am_pure1 .5" 1 "optimized"} } */
+/* { dg-final { scan-tree-dump-times "i_am_const2 .5" 1 "optimized"} } */
+/* { dg-final { scan-tree-dump-times "i_am_const3 .5" 1 "optimized"} } */
+/* { dg-final { scan-tree-dump-times "i_am_pure4 .5" 1 "optimized"} } */
+/* { dg-final { scan-tree-dump "found to be looping pure: i_am_pure1" "local-pure-const1"} } */
+/* { dg-final { scan-tree-dump "found to be looping pure: i_am_pure4" "local-pure-const1"} } */
+/* { dg-final { scan-ipa-dump "found to be const: i_am_const2" "pure-const"} } */
+/* { dg-final { scan-ipa-dump "found to be const: i_am_const3" "pure-const"} } */
+