1 files changed, 112 insertions, 0 deletions
diff --git a/test/CodeGen/builtins-arm-exclusive.c b/test/CodeGen/builtins-arm-exclusive.c
new file mode 100644
index 0000000..7eccb9e
--- /dev/null
+++ b/test/CodeGen/builtins-arm-exclusive.c
@@ -0,0 +1,112 @@
+// REQUIRES: arm-registered-target
+// RUN: %clang_cc1 -Wall -Werror -triple thumbv7-linux-gnueabi -fno-signed-char -O3 -emit-llvm -o - %s | FileCheck %s
+
+// Make sure the canonical use works before going into smaller details:
+int atomic_inc(int *addr) {
+  int Failure, OldVal;
+  do {
+    OldVal = __builtin_arm_ldrex(addr);
+    Failure = __builtin_arm_strex(OldVal + 1, addr);
+  } while (Failure);
+
+  return OldVal;
+}
+
+// CHECK: @atomic_inc
+// CHECK:   [[OLDVAL:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* %addr)
+// CHECK:   [[INC:%.*]] = add nsw i32 [[OLDVAL]], 1
+// CHECK:   [[FAILURE:%.*]] = tail call i32 @llvm.arm.strex.p0i32(i32 [[INC]], i32* %addr)
+// CHECK:   [[TST:%.*]] = icmp eq i32 [[FAILURE]], 0
+// CHECK:   br i1 [[TST]], label {{%[a-zA-Z0-9.]+}}, label {{%[a-zA-Z0-9.]+}}
+
+struct Simple {
+  char a, b;
+};
+
+int test_ldrex(char *addr, long long *addr64, float *addrfloat) {
+// CHECK: @test_ldrex
+  int sum = 0;
+  sum += __builtin_arm_ldrex(addr);
+// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i8(i8* %addr)
+// CHECK: and i32 [[INTRES]], 255
+
+  sum += __builtin_arm_ldrex((short *)addr);
+// CHECK: [[ADDR16:%.*]] = bitcast i8* %addr to i16*
+// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i16(i16* [[ADDR16]])
+// CHECK: [[TMPSEXT:%.*]] = shl i32 [[INTRES]], 16
+// CHECK: ashr exact i32 [[TMPSEXT]], 16
+
+  sum += __builtin_arm_ldrex((int *)addr);
+// CHECK: [[ADDR32:%.*]] = bitcast i8* %addr to i32*
+// CHECK:  call i32 @llvm.arm.ldrex.p0i32(i32* [[ADDR32]])
+
+  sum += __builtin_arm_ldrex((long long *)addr);
+// CHECK: call { i32, i32 } @llvm.arm.ldrexd(i8* %addr)
+
+  sum += __builtin_arm_ldrex(addr64);
+// CHECK: [[ADDR64_AS8:%.*]] = bitcast i64* %addr64 to i8*
+// CHECK: call { i32, i32 } @llvm.arm.ldrexd(i8* [[ADDR64_AS8]])
+
+  sum += __builtin_arm_ldrex(addrfloat);
+// CHECK: [[INTADDR:%.*]] = bitcast float* %addrfloat to i32*
+// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* [[INTADDR]])
+// CHECK: bitcast i32 [[INTRES]] to float
+
+  sum += __builtin_arm_ldrex((double *)addr);
+// CHECK: [[STRUCTRES:%.*]] = tail call { i32, i32 } @llvm.arm.ldrexd(i8* %addr)
+// CHECK: [[RESHI:%.*]] = extractvalue { i32, i32 } [[STRUCTRES]], 1
+// CHECK: [[RESLO:%.*]] = extractvalue { i32, i32 } [[STRUCTRES]], 0
+// CHECK: [[RESHI64:%.*]] = zext i32 [[RESHI]] to i64
+// CHECK: [[RESLO64:%.*]] = zext i32 [[RESLO]] to i64
+// CHECK: [[RESHIHI:%.*]] = shl nuw i64 [[RESHI64]], 32
+// CHECK: [[INTRES:%.*]] = or i64 [[RESHIHI]], [[RESLO64]]
+// CHECK: bitcast i64 [[INTRES]] to double
+
+  sum += *__builtin_arm_ldrex((int **)addr);
+// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* [[ADDR32]])
+// CHECK: inttoptr i32 [[INTRES]] to i32*
+
+  sum += __builtin_arm_ldrex((struct Simple **)addr)->a;
+// CHECK: [[INTRES:%.*]] = tail call i32 @llvm.arm.ldrex.p0i32(i32* [[ADDR32]])
+// CHECK: inttoptr i32 [[INTRES]] to %struct.Simple*
+
+  return sum;
+}
+
+int test_strex(char *addr) {
+// CHECK: @test_strex
+  int res = 0;
+  struct Simple var = {0};
+  res |= __builtin_arm_strex(4, addr);
+// CHECK: call i32 @llvm.arm.strex.p0i8(i32 4, i8* %addr)
+
+  res |= __builtin_arm_strex(42, (short *)addr);
+// CHECK: [[ADDR16:%.*]] = bitcast i8* %addr to i16*
+// CHECK:  call i32 @llvm.arm.strex.p0i16(i32 42, i16* [[ADDR16]])
+
+  res |= __builtin_arm_strex(42, (int *)addr);
+// CHECK: [[ADDR32:%.*]] = bitcast i8* %addr to i32*
+// CHECK: call i32 @llvm.arm.strex.p0i32(i32 42, i32* [[ADDR32]])
+
+  res |= __builtin_arm_strex(42, (long long *)addr);
+// CHECK: call i32 @llvm.arm.strexd(i32 42, i32 0, i8* %addr)
+
+  res |= __builtin_arm_strex(2.71828f, (float *)addr);
+// CHECK: call i32 @llvm.arm.strex.p0i32(i32 1076754509, i32* [[ADDR32]])
+
+  res |= __builtin_arm_strex(3.14159, (double *)addr);
+// CHECK: call i32 @llvm.arm.strexd(i32 -266631570, i32 1074340345, i8* %addr)
+
+  res |= __builtin_arm_strex(&var, (struct Simple **)addr);
+// CHECK: [[INTVAL:%.*]] = ptrtoint i16* %var to i32
+// CHECK: call i32 @llvm.arm.strex.p0i32(i32 [[INTVAL]], i32* [[ADDR32]])
+
+  return res;
+}
+
+void test_clrex() {
+// CHECK: @test_clrex
+
+  __builtin_arm_clrex();
+// CHECK: call void @llvm.arm.clrex()
+}