-fcatch-undefined-behavior: Start checking loads and stores for null pointers.

We want the diagnostic, and if the load is optimized away, we still want to
trap it. Stop checking non-default address spaces; that doesn't work in
general.

llvm-svn: 167219

1 files changed, 13 insertions, 3 deletions

diff --git a/clang/test/CodeGen/catch-undef-behavior.c b/clang/test/CodeGen/catch-undef-behavior.c
index a90206e46c4..5283b3ba51e 100644
--- a/clang/test/CodeGen/catch-undef-behavior.c
+++ b/clang/test/CodeGen/catch-undef-behavior.c
@@ -21,14 +21,18 @@
 // CHECK: @foo
 void foo() {
   union { int i; } u;
-  // CHECK:      %[[SIZE:.*]] = call i64 @llvm.objectsize.i64({{.*}} %[[PTR:.*]], i1 false)
+  // CHECK:      %[[CHECK0:.*]] = icmp ne {{.*}}* %[[PTR:.*]], null
+
+  // CHECK:      %[[I8PTR:.*]] = bitcast i32* %[[PTR]] to i8*
+  // CHECK-NEXT: %[[SIZE:.*]] = call i64 @llvm.objectsize.i64(i8* %[[I8PTR]], i1 false)
   // CHECK-NEXT: %[[CHECK1:.*]] = icmp uge i64 %[[SIZE]], 4
+  // CHECK-NEXT: %[[CHECK01:.*]] = and i1 %[[CHECK0]], %[[CHECK1]]
 
-  // CHECK:      %[[PTRTOINT:.*]] = ptrtoint {{.*}} %[[PTR]] to i64
+  // CHECK:      %[[PTRTOINT:.*]] = ptrtoint {{.*}}* %[[PTR]] to i64
   // CHECK-NEXT: %[[MISALIGN:.*]] = and i64 %[[PTRTOINT]], 3
   // CHECK-NEXT: %[[CHECK2:.*]] = icmp eq i64 %[[MISALIGN]], 0
 
-  // CHECK:      %[[OK:.*]] = and i1 %[[CHECK1]], %[[CHECK2]]
+  // CHECK:      %[[OK:.*]] = and i1 %[[CHECK01]], %[[CHECK2]]
   // CHECK-NEXT: br i1 %[[OK]]
 
   // CHECK:      %[[ARG:.*]] = ptrtoint {{.*}} %[[PTR]] to i64
@@ -52,6 +56,12 @@ int bar(int *a) {
   return *a;
 }
 
+// CHECK: @addr_space
+int addr_space(int __attribute__((address_space(256))) *a) {
+  // CHECK-NOT: __ubsan
+  return *a;
+}
+
 // CHECK: @lsh_overflow
 int lsh_overflow(int a, int b) {
   // CHECK:      %[[INBOUNDS:.*]] = icmp ule i32 %[[RHS:.*]], 31