| // 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() |
| } |