1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -O1 -S < %s | FileCheck %s --check-prefixes=CHECK,CHECK-01
3 ; RUN: opt -O2 -S < %s | FileCheck %s --check-prefixes=CHECK,CHECK-02
4 ; RUN: opt -O3 -S < %s | FileCheck %s --check-prefixes=CHECK,CHECK-03
6 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
7 target triple = "x86_64-unknown-linux-gnu"
9 ; int two_shifts_by_sext(int val, char len) {
10 ; return (val << len) >> len;
13 ; int two_shifts_by_same_sext(int val, char len) {
15 ; return (val << wide_len) >> wide_len;
18 ; void use_int32(int);
19 ; int two_shifts_by_sext_with_extra_use(int val, char len) {
21 ; return (val << len) >> len;
24 ; int two_shifts_by_same_sext_with_extra_use(int val, char len) {
26 ; use_int32(wide_len);
27 ; return (val << wide_len) >> wide_len;
30 define i32 @two_shifts_by_sext(i32 %val, i8 signext %len) {
31 ; CHECK-LABEL: @two_shifts_by_sext(
32 ; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[LEN:%.*]] to i32
33 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[VAL:%.*]], [[CONV]]
34 ; CHECK-NEXT: [[SHR:%.*]] = ashr i32 [[SHL]], [[CONV]]
35 ; CHECK-NEXT: ret i32 [[SHR]]
37 %val.addr = alloca i32, align 4
38 %len.addr = alloca i8, align 1
39 store i32 %val, i32* %val.addr, align 4
40 store i8 %len, i8* %len.addr, align 1
41 %val.reloaded = load i32, i32* %val.addr, align 4
42 %len.reloaded.0 = load i8, i8* %len.addr, align 1
43 %conv = sext i8 %len.reloaded.0 to i32
44 %shl = shl i32 %val.reloaded, %conv
45 %len.reloaded.1 = load i8, i8* %len.addr, align 1
46 %conv1 = sext i8 %len.reloaded.1 to i32
47 %shr = ashr i32 %shl, %conv1
51 define i32 @two_shifts_by_same_sext(i32 %val, i8 signext %len) {
52 ; CHECK-LABEL: @two_shifts_by_same_sext(
53 ; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[LEN:%.*]] to i32
54 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[VAL:%.*]], [[CONV]]
55 ; CHECK-NEXT: [[SHR:%.*]] = ashr i32 [[SHL]], [[CONV]]
56 ; CHECK-NEXT: ret i32 [[SHR]]
58 %val.addr = alloca i32, align 4
59 %len.addr = alloca i8, align 1
60 %wide_len = alloca i32, align 4
61 store i32 %val, i32* %val.addr, align 4
62 store i8 %len, i8* %len.addr, align 1
63 %len.reloaded.0 = load i8, i8* %len.addr, align 1
64 %conv = sext i8 %len.reloaded.0 to i32
65 store i32 %conv, i32* %wide_len, align 4
66 %val.reloaded = load i32, i32* %val.addr, align 4
67 %len.reloaded.1 = load i32, i32* %wide_len, align 4
68 %shl = shl i32 %val.reloaded, %len.reloaded.1
69 %len.reloaded.2 = load i32, i32* %wide_len, align 4
70 %shr = ashr i32 %shl, %len.reloaded.2
74 define i32 @two_shifts_by_sext_with_extra_use(i32 %val, i8 signext %len) {
75 ; CHECK-LABEL: @two_shifts_by_sext_with_extra_use(
76 ; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[LEN:%.*]] to i32
77 ; CHECK-NEXT: tail call void @use_int32(i32 [[CONV]])
78 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[VAL:%.*]], [[CONV]]
79 ; CHECK-NEXT: [[SHR:%.*]] = ashr i32 [[SHL]], [[CONV]]
80 ; CHECK-NEXT: ret i32 [[SHR]]
82 %val.addr = alloca i32, align 4
83 %len.addr = alloca i8, align 1
84 store i32 %val, i32* %val.addr, align 4
85 store i8 %len, i8* %len.addr, align 1
86 %len.reloaded.0 = load i8, i8* %len.addr, align 1
87 %conv = sext i8 %len.reloaded.0 to i32
88 call void @use_int32(i32 %conv)
89 %val.reloaded = load i32, i32* %val.addr, align 4
90 %len.reloaded.1 = load i8, i8* %len.addr, align 1
91 %conv1 = sext i8 %len.reloaded.1 to i32
92 %shl = shl i32 %val.reloaded, %conv1
93 %len.reloaded.2 = load i8, i8* %len.addr, align 1
94 %conv2 = sext i8 %len.reloaded.2 to i32
95 %shr = ashr i32 %shl, %conv2
99 declare void @use_int32(i32)
101 define i32 @two_shifts_by_same_sext_with_extra_use(i32 %val, i8 signext %len) {
102 ; CHECK-LABEL: @two_shifts_by_same_sext_with_extra_use(
103 ; CHECK-NEXT: [[CONV:%.*]] = sext i8 [[LEN:%.*]] to i32
104 ; CHECK-NEXT: tail call void @use_int32(i32 [[CONV]])
105 ; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[VAL:%.*]], [[CONV]]
106 ; CHECK-NEXT: [[SHR:%.*]] = ashr i32 [[SHL]], [[CONV]]
107 ; CHECK-NEXT: ret i32 [[SHR]]
109 %val.addr = alloca i32, align 4
110 %len.addr = alloca i8, align 1
111 %wide_len = alloca i32, align 4
112 store i32 %val, i32* %val.addr, align 4
113 store i8 %len, i8* %len.addr, align 1
114 %len.reloaded.0 = load i8, i8* %len.addr, align 1
115 %conv = sext i8 %len.reloaded.0 to i32
116 store i32 %conv, i32* %wide_len, align 4
117 %val.reloaded = load i32, i32* %wide_len, align 4
118 call void @use_int32(i32 %val.reloaded)
119 %len.reloaded.1 = load i32, i32* %val.addr, align 4
120 %len.reloaded.2 = load i32, i32* %wide_len, align 4
121 %shl = shl i32 %len.reloaded.1, %len.reloaded.2
122 %wide_len.reloaded = load i32, i32* %wide_len, align 4
123 %shr = ashr i32 %shl, %wide_len.reloaded