Implement bit-field promotion rules for C99. Fixes PR3500.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70571 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/bitfield-promote.c b/test/CodeGen/bitfield-promote.c
new file mode 100644
index 0000000..5894e51
--- /dev/null
+++ b/test/CodeGen/bitfield-promote.c
@@ -0,0 +1,19 @@
+// RUN: clang -O3 -emit-llvm -S -o %t %s &&
+// RUN: grep 'ret i64 4294967292' %t | count 2 &&
+// RUN: grep 'ret i64 -4' %t | count 1 &&
+// RUN: true
+
+long long f0(void) {
+ struct { unsigned f0 : 32; } x = { 18 };
+ return (long long) (x.f0 - (int) 22);
+}
+
+long long f1(void) {
+ struct { unsigned f0 : 31; } x = { 18 };
+ return (long long) (x.f0 - (int) 22);
+}
+
+long long f2(void) {
+ struct { unsigned f0 ; } x = { 18 };
+ return (long long) (x.f0 - (int) 22);
+}