diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2019-01-19 10:04:05 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2019-01-19 10:04:05 +0000 |
| commit | 676fbe8105eeb6ff4bb2ed261cb212fcfdbe7b63 (patch) | |
| tree | 02a1ac369cb734d0abfa5000dd86e5b7797e6a74 /test/CodeGen/builtin_clrsb.c | |
| parent | c7e70c433efc6953dc3888b9fbf9f3512d7da2b0 (diff) | |
Diffstat (limited to 'test/CodeGen/builtin_clrsb.c')
| -rw-r--r-- | test/CodeGen/builtin_clrsb.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/builtin_clrsb.c b/test/CodeGen/builtin_clrsb.c new file mode 100644 index 0000000000000..c51777ed1222c --- /dev/null +++ b/test/CodeGen/builtin_clrsb.c @@ -0,0 +1,22 @@ +// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s + +int test__builtin_clrsb(int x) { +// CHECK-LABEL: test__builtin_clrsb +// CHECK: [[C:%.*]] = icmp slt i32 [[X:%.*]], 0 +// CHECK-NEXT: [[INV:%.*]] = xor i32 [[X]], -1 +// CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 [[INV]], i32 [[X]] +// CHECK-NEXT: [[CTLZ:%.*]] = call i32 @llvm.ctlz.i32(i32 [[SEL]], i1 false) +// CHECK-NEXT: [[SUB:%.*]] = sub i32 [[CTLZ]], 1 + return __builtin_clrsb(x); +} + +int test__builtin_clrsbll(long long x) { +// CHECK-LABEL: test__builtin_clrsbll +// CHECK: [[C:%.*]] = icmp slt i64 [[X:%.*]], 0 +// CHECK-NEXT: [[INV:%.*]] = xor i64 [[X]], -1 +// CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i64 [[INV]], i64 [[X]] +// CHECK-NEXT: [[CTLZ:%.*]] = call i64 @llvm.ctlz.i64(i64 [[SEL]], i1 false) +// CHECK-NEXT: [[SUB:%.*]] = sub i64 [[CTLZ]], 1 +// CHECK-NEXT: trunc i64 [[SUB]] to i32 + return __builtin_clrsbll(x); +} |