1 ; RUN: opt -S -demanded-bits -analyze < %s | FileCheck %s
2 ; RUN: opt -S -disable-output -passes="print<demanded-bits>" < %s 2>&1 | FileCheck %s
4 ; CHECK-DAG: DemandedBits: 0xff000000 for %1 = or i32 %x, 1
5 ; CHECK-DAG: DemandedBits: 0xff for %2 = call i32 @llvm.bitreverse.i32(i32 %1)
6 ; CHECK-DAG: DemandedBits: 0xff for %3 = trunc i32 %2 to i8
7 define i8 @test_bswap(i32 %x) {
9 %2 = call i32 @llvm.bswap.i32(i32 %1)
10 %3 = trunc i32 %2 to i8
13 declare i32 @llvm.bswap.i32(i32)
15 ; CHECK-DAG: DemandedBits: 0xff000000 for %1 = or i32 %x, 1
16 ; CHECK-DAG: DemandedBits: 0xff for %2 = call i32 @llvm.bswap.i32(i32 %1)
17 ; CHECK-DAG: DemandedBits: 0xff for %3 = trunc i32 %2 to i8
18 define i8 @test_bitreverse(i32 %x) {
20 %2 = call i32 @llvm.bitreverse.i32(i32 %1)
21 %3 = trunc i32 %2 to i8
24 declare i32 @llvm.bitreverse.i32(i32)
27 declare i32 @llvm.fshl.i32(i32, i32, i32)
28 declare i33 @llvm.fshr.i33(i33, i33, i33)
30 ; CHECK-DAG: DemandedBits: 0xff for %x2 = or i32 %x, 1
31 ; CHECK-DAG: DemandedBits: 0xff000000 for %y2 = or i32 %y, 1
32 ; CHECK-DAG: DemandedBits: 0xffff for %z = call i32 @llvm.fshl.i32(i32 %x2, i32 %y2, i32 8)
33 ; CHECK-DAG: DemandedBits: 0xffffffff for %r = and i32 %z, 65535
34 define i32 @test_fshl(i32 %x, i32 %y) {
37 %z = call i32 @llvm.fshl.i32(i32 %x2, i32 %y2, i32 8)
38 %r = and i32 %z, 65535
42 ; CHECK-DAG: DemandedBits: 0xff for %x2 = or i33 %x, 1
43 ; CHECK-DAG: DemandedBits: 0x1fe000000 for %y2 = or i33 %y, 1
44 ; CHECK-DAG: DemandedBits: 0xffff for %z = call i33 @llvm.fshr.i33(i33 %x2, i33 %y2, i33 25)
45 ; CHECK-DAG: DemandedBits: 0x1ffffffff for %r = and i33 %z, 65535
46 define i33 @test_fshr(i33 %x, i33 %y) {
49 %z = call i33 @llvm.fshr.i33(i33 %x2, i33 %y2, i33 25)
50 %r = and i33 %z, 65535
54 ; CHECK-DAG: DemandedBits: 0xffff for %x2 = or i32 %x, 1
55 ; CHECK-DAG: DemandedBits: 0x0 for %y2 = or i32 %y, 1
56 ; CHECK-DAG: DemandedBits: 0xffff for %z = call i32 @llvm.fshl.i32(i32 %x2, i32 %y2, i32 0)
57 ; CHECK-DAG: DemandedBits: 0xffffffff for %r = and i32 %z, 65535
58 define i32 @test_fshl_zero_shift(i32 %x, i32 %y) {
61 %z = call i32 @llvm.fshl.i32(i32 %x2, i32 %y2, i32 0)
62 %r = and i32 %z, 65535
66 ; CHECK-DAG: DemandedBits: 0x0 for %x2 = or i33 %x, 1
67 ; CHECK-DAG: DemandedBits: 0xffff for %y2 = or i33 %y, 1
68 ; CHECK-DAG: DemandedBits: 0xffff for %z = call i33 @llvm.fshr.i33(i33 %x2, i33 %y2, i33 33)
69 ; CHECK-DAG: DemandedBits: 0x1ffffffff for %r = and i33 %z, 65535
70 define i33 @test_fshr_full_shift(i33 %x, i33 %y) {
73 %z = call i33 @llvm.fshr.i33(i33 %x2, i33 %y2, i33 33)
74 %r = and i33 %z, 65535
78 ; CHECK-DAG: DemandedBits: 0xffffffff for %x2 = or i32 %x, 1
79 ; CHECK-DAG: DemandedBits: 0xffffffff for %y2 = or i32 %y, 1
80 ; CHECK-DAG: DemandedBits: 0x1f for %z2 = or i32 %z, 1
81 ; CHECK-DAG: DemandedBits: 0xffff for %f = call i32 @llvm.fshl.i32(i32 %x2, i32 %y2, i32 %z2)
82 ; CHECK-DAG: DemandedBits: 0xffffffff for %r = and i32 %f, 65535
83 define i32 @test_fshl_pow2_bitwidth(i32 %x, i32 %y, i32 %z) {
87 %f = call i32 @llvm.fshl.i32(i32 %x2, i32 %y2, i32 %z2)
88 %r = and i32 %f, 65535
92 ; CHECK-DAG: DemandedBits: 0x1ffffffff for %x2 = or i33 %x, 1
93 ; CHECK-DAG: DemandedBits: 0x1ffffffff for %y2 = or i33 %y, 1
94 ; CHECK-DAG: DemandedBits: 0x1ffffffff for %z2 = or i33 %z, 1
95 ; CHECK-DAG: DemandedBits: 0xffff for %f = call i33 @llvm.fshr.i33(i33 %x2, i33 %y2, i33 %z2)
96 ; CHECK-DAG: DemandedBits: 0x1ffffffff for %r = and i33 %f, 65535
97 define i33 @test_fshr_non_pow2_bitwidth(i33 %x, i33 %y, i33 %z) {
101 %f = call i33 @llvm.fshr.i33(i33 %x2, i33 %y2, i33 %z2)
102 %r = and i33 %f, 65535