1 ; Test that the strcpy library call simplifier works correctly.
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 ; RUN: opt < %s -mtriple i386-pc-linux -instcombine -S | FileCheck %s -check-prefix=LINUX
5 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
9 declare i32 @ffsll(i64)
13 define i32 @test_simplify1() {
14 ; CHECK: @test_simplify1
15 %ret = call i32 @ffs(i32 0)
17 ; CHECK-NEXT: ret i32 0
20 define i32 @test_simplify2() {
21 ; CHECK-LINUX: @test_simplify2
22 %ret = call i32 @ffsl(i32 0)
24 ; CHECK-LINUX-NEXT: ret i32 0
27 define i32 @test_simplify3() {
28 ; CHECK-LINUX: @test_simplify3
29 %ret = call i32 @ffsll(i64 0)
31 ; CHECK-LINUX-NEXT: ret i32 0
34 ; Check ffs(c) -> cttz(c) + 1, where 'c' is a constant.
36 define i32 @test_simplify4() {
37 ; CHECK: @test_simplify4
38 %ret = call i32 @ffs(i32 1)
40 ; CHECK-NEXT: ret i32 1
43 define i32 @test_simplify5() {
44 ; CHECK: @test_simplify5
45 %ret = call i32 @ffs(i32 2048)
47 ; CHECK-NEXT: ret i32 12
50 define i32 @test_simplify6() {
51 ; CHECK: @test_simplify6
52 %ret = call i32 @ffs(i32 65536)
54 ; CHECK-NEXT: ret i32 17
57 define i32 @test_simplify7() {
58 ; CHECK-LINUX: @test_simplify7
59 %ret = call i32 @ffsl(i32 65536)
61 ; CHECK-LINUX-NEXT: ret i32 17
64 define i32 @test_simplify8() {
65 ; CHECK-LINUX: @test_simplify8
66 %ret = call i32 @ffsll(i64 1024)
68 ; CHECK-LINUX-NEXT: ret i32 11
71 define i32 @test_simplify9() {
72 ; CHECK-LINUX: @test_simplify9
73 %ret = call i32 @ffsll(i64 65536)
75 ; CHECK-LINUX-NEXT: ret i32 17
78 define i32 @test_simplify10() {
79 ; CHECK-LINUX: @test_simplify10
80 %ret = call i32 @ffsll(i64 17179869184)
82 ; CHECK-LINUX-NEXT: ret i32 35
85 define i32 @test_simplify11() {
86 ; CHECK-LINUX: @test_simplify11
87 %ret = call i32 @ffsll(i64 281474976710656)
89 ; CHECK-LINUX-NEXT: ret i32 49
92 define i32 @test_simplify12() {
93 ; CHECK-LINUX: @test_simplify12
94 %ret = call i32 @ffsll(i64 1152921504606846976)
96 ; CHECK-LINUX-NEXT: ret i32 61
99 ; Check ffs(x) -> x != 0 ? (i32)llvm.cttz(x) + 1 : 0.
101 define i32 @test_simplify13(i32 %x) {
102 ; CHECK: @test_simplify13
103 %ret = call i32 @ffs(i32 %x)
104 ; CHECK-NEXT: [[CTTZ:%[a-z0-9]+]] = call i32 @llvm.cttz.i32(i32 %x, i1 false)
105 ; CHECK-NEXT: [[INC:%[a-z0-9]+]] = add i32 [[CTTZ]], 1
106 ; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp ne i32 %x, 0
107 ; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[INC]], i32 0
109 ; CHECK-NEXT: ret i32 [[RET]]
112 define i32 @test_simplify14(i32 %x) {
113 ; CHECK-LINUX: @test_simplify14
114 %ret = call i32 @ffsl(i32 %x)
115 ; CHECK-LINUX-NEXT: [[CTTZ:%[a-z0-9]+]] = call i32 @llvm.cttz.i32(i32 %x, i1 false)
116 ; CHECK-LINUX-NEXT: [[INC:%[a-z0-9]+]] = add i32 [[CTTZ]], 1
117 ; CHECK-LINUX-NEXT: [[CMP:%[a-z0-9]+]] = icmp ne i32 %x, 0
118 ; CHECK-LINUX-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[INC]], i32 0
120 ; CHECK-LINUX-NEXT: ret i32 [[RET]]
123 define i32 @test_simplify15(i64 %x) {
124 ; CHECK-LINUX: @test_simplify15
125 %ret = call i32 @ffsll(i64 %x)
126 ; CHECK-LINUX-NEXT: [[CTTZ:%[a-z0-9]+]] = call i64 @llvm.cttz.i64(i64 %x, i1 false)
127 ; CHECK-LINUX-NEXT: [[INC:%[a-z0-9]+]] = add i64 [[CTTZ]], 1
128 ; CHECK-LINUX-NEXT: [[TRUNC:%[a-z0-9]+]] = trunc i64 [[INC]] to i32
129 ; CHECK-LINUX-NEXT: [[CMP:%[a-z0-9]+]] = icmp ne i64 %x, 0
130 ; CHECK-LINUX-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[CMP]], i32 [[TRUNC]], i32 0
132 ; CHECK-LINUX-NEXT: ret i32 [[RET]]