1 files changed, 162 insertions, 0 deletions
diff --git a/test/CodeGenCXX/finegrain-bitfield-access.cpp b/test/CodeGenCXX/finegrain-bitfield-access.cpp
new file mode 100644
index 000000000000..2973f9f73c4e
--- /dev/null
+++ b/test/CodeGenCXX/finegrain-bitfield-access.cpp
@@ -0,0 +1,162 @@
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -ffine-grained-bitfield-accesses \
+// RUN:   -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -ffine-grained-bitfield-accesses \
+// RUN:   -emit-llvm -fsanitize=address -o - %s | FileCheck %s --check-prefix=SANITIZE
+// Check -fsplit-bitfields will be ignored since sanitizer is enabled.
+
+struct S1 {
+  unsigned f1:2;
+  unsigned f2:6;
+  unsigned f3:8;
+  unsigned f4:4;
+  unsigned f5:8;
+};
+
+S1 a1;
+unsigned read8_1() {
+  // CHECK-LABEL: @_Z7read8_1v
+  // CHECK: %bf.load = load i8, i8* getelementptr inbounds (%struct.S1, %struct.S1* @a1, i32 0, i32 1), align 1
+  // CHECK-NEXT: %bf.cast = zext i8 %bf.load to i32
+  // CHECK-NEXT: ret i32 %bf.cast
+  // SANITIZE-LABEL: @_Z7read8_1v
+  // SANITIZE: %bf.load = load i32, i32* getelementptr inbounds {{.*}}, align 4
+  // SANITIZE: %bf.lshr = lshr i32 %bf.load, 8
+  // SANITIZE: %bf.clear = and i32 %bf.lshr, 255
+  // SANITIZE: ret i32 %bf.clear
+  return a1.f3;
+}
+void write8_1() {
+  // CHECK-LABEL: @_Z8write8_1v
+  // CHECK: store i8 3, i8* getelementptr inbounds (%struct.S1, %struct.S1* @a1, i32 0, i32 1), align 1
+  // CHECK-NEXT: ret void
+  // SANITIZE-LABEL: @_Z8write8_1v
+  // SANITIZE: %bf.load = load i32, i32* getelementptr inbounds {{.*}}, align 4
+  // SANITIZE-NEXT: %bf.clear = and i32 %bf.load, -65281
+  // SANITIZE-NEXT: %bf.set = or i32 %bf.clear, 768
+  // SANITIZE-NEXT: store i32 %bf.set, i32* getelementptr inbounds {{.*}}, align 4
+  // SANITIZE-NEXT: ret void
+  a1.f3 = 3;
+}
+
+unsigned read8_2() {
+  // CHECK-LABEL: @_Z7read8_2v
+  // CHECK: %bf.load = load i16, i16* getelementptr inbounds (%struct.S1, %struct.S1* @a1, i32 0, i32 2), align 2
+  // CHECK-NEXT: %bf.lshr = lshr i16 %bf.load, 4
+  // CHECK-NEXT: %bf.clear = and i16 %bf.lshr, 255
+  // CHECK-NEXT: %bf.cast = zext i16 %bf.clear to i32
+  // CHECK-NEXT: ret i32 %bf.cast
+  // SANITIZE-LABEL: @_Z7read8_2v
+  // SANITIZE: %bf.load = load i32, i32* getelementptr inbounds {{.*}}, align 4
+  // SANITIZE-NEXT: %bf.lshr = lshr i32 %bf.load, 20
+  // SANITIZE-NEXT: %bf.clear = and i32 %bf.lshr, 255
+  // SANITIZE-NEXT: ret i32 %bf.clear
+  return a1.f5;
+}
+void write8_2() {
+  // CHECK-LABEL: @_Z8write8_2v
+  // CHECK: %bf.load = load i16, i16* getelementptr inbounds (%struct.S1, %struct.S1* @a1, i32 0, i32 2), align 2
+  // CHECK-NEXT: %bf.clear = and i16 %bf.load, -4081
+  // CHECK-NEXT: %bf.set = or i16 %bf.clear, 48
+  // CHECK-NEXT: store i16 %bf.set, i16* getelementptr inbounds (%struct.S1, %struct.S1* @a1, i32 0, i32 2), align 2
+  // CHECK-NEXT: ret void
+  // SANITIZE-LABEL: @_Z8write8_2v
+  // SANITIZE: %bf.load = load i32, i32* getelementptr inbounds {{.*}}, align 4
+  // SANITIZE-NEXT: %bf.clear = and i32 %bf.load, -267386881
+  // SANITIZE-NEXT: %bf.set = or i32 %bf.clear, 3145728
+  // SANITIZE-NEXT: store i32 %bf.set, i32* getelementptr inbounds {{.*}}, align 4
+  // SANITIZE-NEXT: ret void
+  a1.f5 = 3;
+}
+
+struct S2 {
+  unsigned long f1:16;
+  unsigned long f2:16;
+  unsigned long f3:6;
+};
+
+S2 a2;
+unsigned read16_1() {
+  // CHECK-LABEL: @_Z8read16_1v
+  // CHECK: %bf.load = load i16, i16* getelementptr inbounds (%struct.S2, %struct.S2* @a2, i32 0, i32 0), align 8
+  // CHECK-NEXT: %bf.cast = zext i16 %bf.load to i64
+  // CHECK-NEXT: %conv = trunc i64 %bf.cast to i32
+  // CHECK-NEXT: ret i32 %conv
+  // SANITIZE-LABEL: @_Z8read16_1v
+  // SANITIZE: %bf.load = load i64, i64* bitcast {{.*}}, align 8
+  // SANITIZE-NEXT: %bf.clear = and i64 %bf.load, 65535
+  // SANITIZE-NEXT: %conv = trunc i64 %bf.clear to i32
+  // SANITIZE-NEXT: ret i32 %conv
+  return a2.f1;
+}
+unsigned read16_2() {
+  // CHECK-LABEL: @_Z8read16_2v
+  // CHECK: %bf.load = load i16, i16* getelementptr inbounds (%struct.S2, %struct.S2* @a2, i32 0, i32 1), align 2
+  // CHECK-NEXT: %bf.cast = zext i16 %bf.load to i64
+  // CHECK-NEXT: %conv = trunc i64 %bf.cast to i32
+  // CHECK-NEXT: ret i32 %conv
+  // SANITIZE-LABEL: @_Z8read16_2v
+  // SANITIZE: %bf.load = load i64, i64* bitcast {{.*}}, align 8
+  // SANITIZE-NEXT: %bf.lshr = lshr i64 %bf.load, 16
+  // SANITIZE-NEXT: %bf.clear = and i64 %bf.lshr, 65535
+  // SANITIZE-NEXT: %conv = trunc i64 %bf.clear to i32
+  // SANITIZE-NEXT: ret i32 %conv
+  return a2.f2;
+}
+
+void write16_1() {
+  // CHECK-LABEL: @_Z9write16_1v
+  // CHECK: store i16 5, i16* getelementptr inbounds (%struct.S2, %struct.S2* @a2, i32 0, i32 0), align 8
+  // CHECK-NEXT: ret void
+  // SANITIZE-LABEL: @_Z9write16_1v
+  // SANITIZE: %bf.load = load i64, i64* bitcast {{.*}}, align 8
+  // SANITIZE-NEXT: %bf.clear = and i64 %bf.load, -65536
+  // SANITIZE-NEXT: %bf.set = or i64 %bf.clear, 5
+  // SANITIZE-NEXT: store i64 %bf.set, i64* bitcast {{.*}}, align 8
+  // SANITIZE-NEXT: ret void
+  a2.f1 = 5;
+}
+void write16_2() {
+  // CHECK-LABEL: @_Z9write16_2v
+  // CHECK: store i16 5, i16* getelementptr inbounds (%struct.S2, %struct.S2* @a2, i32 0, i32 1), align 2
+  // CHECK-NEXT: ret void
+  // SANITIZE-LABEL: @_Z9write16_2v
+  // SANITIZE: %bf.load = load i64, i64* bitcast {{.*}}, align 8
+  // SANITIZE-NEXT: %bf.clear = and i64 %bf.load, -4294901761
+  // SANITIZE-NEXT: %bf.set = or i64 %bf.clear, 327680
+  // SANITIZE-NEXT: store i64 %bf.set, i64* bitcast {{.*}}, align 8
+  // SANITIZE-NEXT: ret void
+  a2.f2 = 5;
+}
+
+struct S3 {
+  unsigned long f1:14;
+  unsigned long f2:18;
+  unsigned long f3:32;
+};
+
+S3 a3;
+unsigned read32_1() {
+  // CHECK-LABEL: @_Z8read32_1v
+  // CHECK: %bf.load = load i32, i32* getelementptr inbounds (%struct.S3, %struct.S3* @a3, i32 0, i32 1), align 4
+  // CHECK-NEXT: %bf.cast = zext i32 %bf.load to i64
+  // CHECK-NEXT: %conv = trunc i64 %bf.cast to i32
+  // CHECK-NEXT: ret i32 %conv
+  // SANITIZE-LABEL: @_Z8read32_1v
+  // SANITIZE: %bf.load = load i64, i64* getelementptr inbounds {{.*}}, align 8
+  // SANITIZE-NEXT: %bf.lshr = lshr i64 %bf.load, 32
+  // SANITIZE-NEXT: %conv = trunc i64 %bf.lshr to i32
+  // SANITIZE-NEXT: ret i32 %conv
+  return a3.f3;
+}
+void write32_1() {
+  // CHECK-LABEL: @_Z9write32_1v
+  // CHECK: store i32 5, i32* getelementptr inbounds (%struct.S3, %struct.S3* @a3, i32 0, i32 1), align 4
+  // CHECK-NEXT: ret void
+  // SANITIZE-LABEL: @_Z9write32_1v
+  // SANITIZE: %bf.load = load i64, i64* getelementptr inbounds {{.*}}, align 8
+  // SANITIZE-NEXT: %bf.clear = and i64 %bf.load, 4294967295
+  // SANITIZE-NEXT: %bf.set = or i64 %bf.clear, 21474836480
+  // SANITIZE-NEXT: store i64 %bf.set, i64* getelementptr inbounds {{.*}}, align 8
+  // SANITIZE-NEXT: ret void
+  a3.f3 = 5;
+}