Vendor import of clang trunk r132879:

http://llvm.org/svn/llvm-project/cfe/trunk@132879

1 files changed, 83 insertions, 0 deletions

diff --git a/test/Analysis/misc-ps.c b/test/Analysis/misc-ps.c
new file mode 100644
index 0000000..bef5b06
--- /dev/null
+++ b/test/Analysis/misc-ps.c
@@ -0,0 +1,83 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -disable-free -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=deadcode -verify %s
+
+unsigned long strlen(const char *);
+
+int size_rdar9373039 = 1;
+int rdar9373039() {
+  int x;
+  int j = 0;
+
+  for (int i = 0 ; i < size_rdar9373039 ; ++i)
+    x = 1;
+    
+  // strlen doesn't invalidate the value of 'size_rdar9373039'.
+  int extra = (2 + strlen ("Clang") + ((4 - ((unsigned int) (2 + strlen ("Clang")) % 4)) % 4)) + (2 + strlen ("1.0") + ((4 - ((unsigned int) (2 + strlen ("1.0")) % 4)) % 4));
+
+  for (int i = 0 ; i < size_rdar9373039 ; ++i)
+    j += x; // no-warning
+
+  return j;
+}
+
+int foo_rdar9373039(const char *);
+
+int rdar93730392() {
+  int x;
+  int j = 0;
+
+  for (int i = 0 ; i < size_rdar9373039 ; ++i)
+    x = 1;
+    
+  int extra = (2 + foo_rdar9373039 ("Clang") + ((4 - ((unsigned int) (2 + foo_rdar9373039 ("Clang")) % 4)) % 4)) + (2 + foo_rdar9373039 ("1.0") + ((4 - ((unsigned int) (2 + foo_rdar9373039 ("1.0")) % 4)) % 4)); // expected-warning {{never read}}
+
+  for (int i = 0 ; i < size_rdar9373039 ; ++i)
+    j += x; // expected-warning {{garbage}}
+
+  return j;
+}
+
+
+int PR8962 (int *t) {
+  // This should look through the __extension__ no-op.
+  if (__extension__ (t)) return 0;
+  return *t; // expected-warning {{null pointer}}
+}
+
+int PR8962_b (int *t) {
+  // This should still ignore the nested casts
+  // which aren't handled by a single IgnoreParens()
+  if (((int)((int)t))) return 0;
+  return *t; // expected-warning {{null pointer}}
+}
+
+int PR8962_c (int *t) {
+  // If the last element in a StmtExpr was a ParenExpr, it's still live
+  if (({ (t ? (_Bool)0 : (_Bool)1); })) return 0;
+  return *t; // no-warning
+}
+
+int PR8962_d (int *t) {
+  // If the last element in a StmtExpr is an __extension__, it's still live
+  if (({ __extension__(t ? (_Bool)0 : (_Bool)1); })) return 0;
+  return *t; // no-warning
+}
+
+int PR8962_e (int *t) {
+  // Redundant casts can mess things up!
+  // Environment used to skip through NoOp casts, but LiveVariables didn't!
+  if (({ (t ? (int)(int)0L : (int)(int)1L); })) return 0;
+  return *t; // no-warning
+}
+
+int PR8962_f (int *t) {
+  // The StmtExpr isn't a block-level expression here,
+  // the __extension__ is. But the value should be attached to the StmtExpr
+  // anyway. Make sure the block-level check is /before/ IgnoreParens.
+  if ( __extension__({
+    _Bool r;
+    if (t) r = 0;
+    else r = 1;
+    r;
+  }) ) return 0;
+  return *t; // no-warning
+}