1 ; RUN: llc -mtriple=bpf -mcpu=v2 < %s | FileCheck -check-prefixes=CHECK,V2 %s
2 ; RUN: llc -mtriple=bpf -mcpu=v4 < %s | FileCheck -check-prefixes=CHECK,V4 %s
4 ; Verify that BPFMISimplifyPatchable::checkADDrr correctly rewrites
7 ; Generated from the following source code:
13 ; } __attribute__((preserve_access_index));
15 ; void foo(volatile struct t *t) {
22 ; Using the following command:
23 ; clang -g -O2 -S -emit-llvm --target=bpf t.c -o t.ll
25 @"llvm.t:0:0$0:0" = external global i64, !llvm.preserve.access.index !0 #0
26 @"llvm.t:0:2$0:1" = external global i64, !llvm.preserve.access.index !0 #0
27 @"llvm.t:0:4$0:2" = external global i64, !llvm.preserve.access.index !0 #0
28 @"llvm.t:0:8$0:3" = external global i64, !llvm.preserve.access.index !0 #0
30 ; Function Attrs: nofree nounwind
31 define dso_local void @foo(ptr noundef %t, i64 noundef %v) local_unnamed_addr #1 !dbg !18 {
33 call void @llvm.dbg.value(metadata ptr %t, metadata !24, metadata !DIExpression()), !dbg !26
34 call void @llvm.dbg.value(metadata i64 %v, metadata !25, metadata !DIExpression()), !dbg !26
35 %conv = trunc i64 %v to i8, !dbg !27
36 %0 = load i64, ptr @"llvm.t:0:0$0:0", align 8
37 %1 = getelementptr i8, ptr %t, i64 %0
38 %2 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 0, ptr %1)
39 store volatile i8 %conv, ptr %2, align 8, !dbg !28, !tbaa !29
40 %conv1 = trunc i64 %v to i16, !dbg !36
41 %3 = load i64, ptr @"llvm.t:0:2$0:1", align 8
42 %4 = getelementptr i8, ptr %t, i64 %3
43 %5 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 1, ptr %4)
44 store volatile i16 %conv1, ptr %5, align 2, !dbg !37, !tbaa !38
45 %conv2 = trunc i64 %v to i32, !dbg !39
46 %6 = load i64, ptr @"llvm.t:0:4$0:2", align 8
47 %7 = getelementptr i8, ptr %t, i64 %6
48 %8 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 2, ptr %7)
49 store volatile i32 %conv2, ptr %8, align 4, !dbg !40, !tbaa !41
50 %9 = load i64, ptr @"llvm.t:0:8$0:3", align 8
51 %10 = getelementptr i8, ptr %t, i64 %9
52 %11 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 3, ptr %10)
53 store volatile i64 %v, ptr %11, align 8, !dbg !42, !tbaa !43
59 ; CHECK-NEXT: .Ltmp[[LABEL_UB:.*]]:
61 ; V2-NEXT: *(u8 *)(r1 + 0) = r2
62 ; V4-NEXT: *(u8 *)(r1 + 0) = w2
64 ; CHECK-NEXT: .Ltmp[[LABEL_UH:.*]]:
66 ; V2-NEXT: *(u16 *)(r1 + 2) = r2
67 ; V4-NEXT: *(u16 *)(r1 + 2) = w2
69 ; CHECK-NEXT: .Ltmp[[LABEL_UW:.*]]:
71 ; V2-NEXT: *(u32 *)(r1 + 4) = r2
72 ; V4-NEXT: *(u32 *)(r1 + 4) = w2
74 ; CHECK-NEXT: .Ltmp[[LABEL_UD:.*]]:
76 ; CHECK-NEXT: *(u64 *)(r1 + 8) = r2
78 ; CHECK: .section .BTF
79 ; CHECK: .long [[STR_T:.*]] # BTF_KIND_STRUCT(id = [[ID:.*]])
81 ; CHECK: .byte 116 # string offset=[[STR_T]]
82 ; CHECK: .ascii "0:0" # string offset=[[STR_UB:.*]]
83 ; CHECK: .ascii "0:1" # string offset=[[STR_UH:.*]]
84 ; CHECK: .ascii "0:2" # string offset=[[STR_UW:.*]]
85 ; CHECK: .ascii "0:3" # string offset=[[STR_UD:.*]]
88 ; CHECK: .long .Ltmp[[LABEL_UB]]
89 ; CHECK-NEXT: .long [[ID]]
90 ; CHECK-NEXT: .long [[STR_UB]]
92 ; CHECK: .long .Ltmp[[LABEL_UH]]
93 ; CHECK-NEXT: .long [[ID]]
94 ; CHECK-NEXT: .long [[STR_UH]]
96 ; CHECK: .long .Ltmp[[LABEL_UW]]
97 ; CHECK-NEXT: .long [[ID]]
98 ; CHECK-NEXT: .long [[STR_UW]]
100 ; CHECK: .long .Ltmp[[LABEL_UD]]
101 ; CHECK-NEXT: .long [[ID]]
102 ; CHECK-NEXT: .long [[STR_UD]]
103 ; CHECK-NEXT: .long 0
105 ; Function Attrs: nofree nosync nounwind memory(none)
106 declare ptr @llvm.bpf.passthrough.p0.p0(i32, ptr) #2
108 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
109 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
111 attributes #0 = { "btf_ama" }
112 attributes #1 = { nofree nounwind "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
113 attributes #2 = { nofree nosync nounwind memory(none) }
114 attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
116 !llvm.dbg.cu = !{!11}
117 !llvm.module.flags = !{!12, !13, !14, !15, !16}
120 !0 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t", file: !1, line: 1, size: 128, elements: !2)
121 !1 = !DIFile(filename: "some.file", directory: "/some/dir", checksumkind: CSK_MD5, checksum: "2067f770ab52f9042a61e5bf50a913bd")
122 !2 = !{!3, !5, !7, !9}
123 !3 = !DIDerivedType(tag: DW_TAG_member, name: "ub", scope: !0, file: !1, line: 2, baseType: !4, size: 8)
124 !4 = !DIBasicType(name: "unsigned char", size: 8, encoding: DW_ATE_unsigned_char)
125 !5 = !DIDerivedType(tag: DW_TAG_member, name: "uh", scope: !0, file: !1, line: 3, baseType: !6, size: 16, offset: 16)
126 !6 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned)
127 !7 = !DIDerivedType(tag: DW_TAG_member, name: "uw", scope: !0, file: !1, line: 4, baseType: !8, size: 32, offset: 32)
128 !8 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
129 !9 = !DIDerivedType(tag: DW_TAG_member, name: "ud", scope: !0, file: !1, line: 5, baseType: !10, size: 64, offset: 64)
130 !10 = !DIBasicType(name: "unsigned long", size: 64, encoding: DW_ATE_unsigned)
131 !11 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 18.0.0 (/home/eddy/work/llvm-project/clang 3810f2eb4382d5e2090ce5cd47f45379cb453c35)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
132 !12 = !{i32 7, !"Dwarf Version", i32 5}
133 !13 = !{i32 2, !"Debug Info Version", i32 3}
134 !14 = !{i32 1, !"wchar_size", i32 4}
135 !15 = !{i32 7, !"frame-pointer", i32 2}
136 !16 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
137 !17 = !{!"clang version 18.0.0 (/home/eddy/work/llvm-project/clang 3810f2eb4382d5e2090ce5cd47f45379cb453c35)"}
138 !18 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 13, type: !19, scopeLine: 13, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !11, retainedNodes: !23)
139 !19 = !DISubroutineType(types: !20)
140 !20 = !{null, !21, !10}
141 !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 64)
142 !22 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !0)
144 !24 = !DILocalVariable(name: "t", arg: 1, scope: !18, file: !1, line: 13, type: !21)
145 !25 = !DILocalVariable(name: "v", arg: 2, scope: !18, file: !1, line: 13, type: !10)
146 !26 = !DILocation(line: 0, scope: !18)
147 !27 = !DILocation(line: 14, column: 11, scope: !18)
148 !28 = !DILocation(line: 14, column: 9, scope: !18)
149 !29 = !{!30, !31, i64 0}
150 !30 = !{!"t", !31, i64 0, !33, i64 2, !34, i64 4, !35, i64 8}
151 !31 = !{!"omnipotent char", !32, i64 0}
152 !32 = !{!"Simple C/C++ TBAA"}
153 !33 = !{!"short", !31, i64 0}
154 !34 = !{!"int", !31, i64 0}
155 !35 = !{!"long", !31, i64 0}
156 !36 = !DILocation(line: 15, column: 11, scope: !18)
157 !37 = !DILocation(line: 15, column: 9, scope: !18)
158 !38 = !{!30, !33, i64 2}
159 !39 = !DILocation(line: 16, column: 11, scope: !18)
160 !40 = !DILocation(line: 16, column: 9, scope: !18)
161 !41 = !{!30, !34, i64 4}
162 !42 = !DILocation(line: 17, column: 9, scope: !18)
163 !43 = !{!30, !35, i64 8}
164 !44 = !DILocation(line: 18, column: 1, scope: !18)