1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
2 ; RUN: opt -O2 -S < %s | FileCheck %s
5 ; typedef unsigned long u64;
6 ; void foo(char *data, int idx, u64 *);
7 ; int test(int len, char *data) {
9 ; for (int i = 1; i < len; i++) {
11 ; d[0] = data[0] ?: '0';
18 ; clang -target bpf -O2 -S -emit-llvm -Xclang -disable-llvm-passes test.c
21 source_filename = "test.c"
22 target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
25 @.str = private unnamed_addr constant [3 x i8] c"%c\00", align 1
27 ; Function Attrs: nounwind
28 define dso_local i32 @test(i32 %len, ptr %data) #0 {
29 ; CHECK-LABEL: define dso_local noundef i32 @test(
30 ; CHECK-SAME: i32 [[LEN:%.*]], ptr nocapture readonly [[DATA:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
32 ; CHECK-NEXT: [[D:%.*]] = alloca [1 x i64], align 8
33 ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LEN]], -2
34 ; CHECK-NEXT: [[OR_COND:%.*]] = icmp ult i32 [[TMP0]], 98
35 ; CHECK-NEXT: br i1 [[OR_COND]], label [[FOR_BODY:%.*]], label [[IF_END:%.*]]
37 ; CHECK-NEXT: [[I_05:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY]] ], [ 1, [[ENTRY:%.*]] ]
38 ; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 8, ptr nonnull [[D]]) #[[ATTR3:[0-9]+]]
39 ; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[DATA]], align 1, !tbaa [[TBAA3:![0-9]+]]
40 ; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i8 [[TMP1]], 0
41 ; CHECK-NEXT: [[NARROW:%.*]] = select i1 [[TOBOOL_NOT]], i8 48, i8 [[TMP1]]
42 ; CHECK-NEXT: [[CONV2:%.*]] = sext i8 [[NARROW]] to i64
43 ; CHECK-NEXT: store i64 [[CONV2]], ptr [[D]], align 8, !tbaa [[TBAA6:![0-9]+]]
44 ; CHECK-NEXT: call void @foo(ptr nonnull @.str, i32 [[I_05]], ptr nonnull [[D]]) #[[ATTR3]]
45 ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[D]]) #[[ATTR3]]
46 ; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_05]], 1
47 ; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[INC]], [[LEN]]
48 ; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[IF_END]], label [[FOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
50 ; CHECK-NEXT: ret i32 0
53 %len.addr = alloca i32, align 4
54 %data.addr = alloca ptr, align 8
55 %i = alloca i32, align 4
56 %d = alloca [1 x i64], align 8
57 store i32 %len, ptr %len.addr, align 4, !tbaa !3
58 store ptr %data, ptr %data.addr, align 8, !tbaa !7
59 %0 = load i32, ptr %len.addr, align 4, !tbaa !3
60 %cmp = icmp slt i32 %0, 100
61 br i1 %cmp, label %if.then, label %if.end
63 if.then: ; preds = %entry
64 call void @llvm.lifetime.start.p0(i64 4, ptr %i) #3
65 store i32 1, ptr %i, align 4, !tbaa !3
68 for.cond: ; preds = %for.inc, %if.then
69 %1 = load i32, ptr %i, align 4, !tbaa !3
70 %2 = load i32, ptr %len.addr, align 4, !tbaa !3
71 %cmp1 = icmp slt i32 %1, %2
72 br i1 %cmp1, label %for.body, label %for.cond.cleanup
75 for.cond.cleanup: ; preds = %for.cond
76 call void @llvm.lifetime.end.p0(i64 4, ptr %i) #3
79 for.body: ; preds = %for.cond
80 call void @llvm.lifetime.start.p0(i64 8, ptr %d) #3
81 %3 = load ptr, ptr %data.addr, align 8, !tbaa !7
82 %4 = load i8, ptr %3, align 1, !tbaa !9
83 %conv = sext i8 %4 to i32
84 %tobool = icmp ne i32 %conv, 0
85 br i1 %tobool, label %cond.true, label %cond.false
87 cond.true: ; preds = %for.body
90 cond.false: ; preds = %for.body
93 cond.end: ; preds = %cond.false, %cond.true
94 %cond = phi i32 [ %conv, %cond.true ], [ 48, %cond.false ]
95 %conv2 = sext i32 %cond to i64
96 store i64 %conv2, ptr %d, align 8, !tbaa !10
97 %5 = load i32, ptr %i, align 4, !tbaa !3
98 call void @foo(ptr @.str, i32 %5, ptr %d)
99 call void @llvm.lifetime.end.p0(i64 8, ptr %d) #3
102 for.inc: ; preds = %cond.end
103 %6 = load i32, ptr %i, align 4, !tbaa !3
104 %inc = add nsw i32 %6, 1
105 store i32 %inc, ptr %i, align 4, !tbaa !3
106 br label %for.cond, !llvm.loop !12
108 for.end: ; preds = %for.cond.cleanup
111 if.end: ; preds = %for.end, %entry
115 ; Function Attrs: argmemonly nofree nosync nounwind willreturn
116 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
118 declare dso_local void @foo(ptr, i32, ptr) #2
120 ; Function Attrs: argmemonly nofree nosync nounwind willreturn
121 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
123 attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
124 attributes #1 = { argmemonly nofree nosync nounwind willreturn }
125 attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
126 attributes #3 = { nounwind }
128 !llvm.module.flags = !{!0, !1}
131 !0 = !{i32 1, !"wchar_size", i32 4}
132 !1 = !{i32 7, !"frame-pointer", i32 2}
133 !2 = !{!"clang version 14.0.0 (https://github.com/llvm/llvm-project.git 8385de118443144518c9fba8b3d831d9076e746b)"}
134 !3 = !{!4, !4, i64 0}
135 !4 = !{!"int", !5, i64 0}
136 !5 = !{!"omnipotent char", !6, i64 0}
137 !6 = !{!"Simple C/C++ TBAA"}
138 !7 = !{!8, !8, i64 0}
139 !8 = !{!"any pointer", !5, i64 0}
140 !9 = !{!5, !5, i64 0}
141 !10 = !{!11, !11, i64 0}
142 !11 = !{!"long", !5, i64 0}
143 !12 = distinct !{!12, !13}
144 !13 = !{!"llvm.loop.mustprogress"}