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 3 4; Verify that BPFMISimplifyPatchable::checkADDrr correctly rewrites 5; load instructions. 6; 7; Generated from the following source code: 8; struct t { 9; unsigned char ub; 10; unsigned short uh; 11; unsigned int uw; 12; unsigned long ud; 13; } __attribute__((preserve_access_index)); 14; 15; extern void cu(unsigned long); 16; 17; void bar(volatile struct t *t) { 18; cu(t->ub); 19; cu(t->uh); 20; cu(t->uw); 21; cu(t->ud); 22; } 23; 24; Using the following command: 25; clang -g -O2 -S -emit-llvm --target=bpf t.c -o t.ll 26 27@"llvm.t:0:0$0:0" = external global i64, !llvm.preserve.access.index !0 #0 28@"llvm.t:0:2$0:1" = external global i64, !llvm.preserve.access.index !0 #0 29@"llvm.t:0:4$0:2" = external global i64, !llvm.preserve.access.index !0 #0 30@"llvm.t:0:8$0:3" = external global i64, !llvm.preserve.access.index !0 #0 31 32; Function Attrs: nounwind 33define dso_local void @bar(ptr noundef %t) local_unnamed_addr #1 !dbg !18 { 34entry: 35 call void @llvm.dbg.value(metadata ptr %t, metadata !24, metadata !DIExpression()), !dbg !25 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 %3 = load volatile i8, ptr %2, align 8, !dbg !26, !tbaa !27 40 %conv = zext i8 %3 to i64, !dbg !34 41 tail call void @cu(i64 noundef %conv) #5, !dbg !35 42 %4 = load i64, ptr @"llvm.t:0:2$0:1", align 8 43 %5 = getelementptr i8, ptr %t, i64 %4 44 %6 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 1, ptr %5) 45 %7 = load volatile i16, ptr %6, align 2, !dbg !36, !tbaa !37 46 %conv1 = zext i16 %7 to i64, !dbg !38 47 tail call void @cu(i64 noundef %conv1) #5, !dbg !39 48 %8 = load i64, ptr @"llvm.t:0:4$0:2", align 8 49 %9 = getelementptr i8, ptr %t, i64 %8 50 %10 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 2, ptr %9) 51 %11 = load volatile i32, ptr %10, align 4, !dbg !40, !tbaa !41 52 %conv2 = zext i32 %11 to i64, !dbg !42 53 tail call void @cu(i64 noundef %conv2) #5, !dbg !43 54 %12 = load i64, ptr @"llvm.t:0:8$0:3", align 8 55 %13 = getelementptr i8, ptr %t, i64 %12 56 %14 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 3, ptr %13) 57 %15 = load volatile i64, ptr %14, align 8, !dbg !44, !tbaa !45 58 tail call void @cu(i64 noundef %15) #5, !dbg !46 59 ret void, !dbg !47 60} 61 62; CHECK: bar: 63; CHECK: prologue_end 64; CHECK-NEXT: .Ltmp[[LABEL_UB:.*]]: 65; CHECK-NEXT: .Ltmp 66; V2-NEXT: r1 = *(u8 *)(r6 + 0) 67; V4-NEXT: w1 = *(u8 *)(r6 + 0) 68; CHECK-NEXT: .loc 69; CHECK-NEXT: .Ltmp 70; CHECK-NEXT: call cu 71; CHECK-NEXT: .Ltmp 72; CHECK-NEXT: .loc 73; CHECK-NEXT: .Ltmp[[LABEL_UH:.*]]: 74; CHECK-NEXT: .Ltmp 75; V2-NEXT: r1 = *(u16 *)(r6 + 2) 76; V4-NEXT: w1 = *(u16 *)(r6 + 2) 77; CHECK-NEXT: .loc 78; CHECK-NEXT: .Ltmp 79; CHECK-NEXT: call cu 80; CHECK-NEXT: .Ltmp 81; CHECK-NEXT: .loc 82; CHECK-NEXT: .Ltmp[[LABEL_UW:.*]]: 83; CHECK-NEXT: .Ltmp 84; V2-NEXT: r1 = *(u32 *)(r6 + 4) 85; V4-NEXT: w1 = *(u32 *)(r6 + 4) 86; CHECK-NEXT: .loc 87; CHECK-NEXT: .Ltmp 88; CHECK-NEXT: call cu 89; CHECK-NEXT: .Ltmp 90; CHECK-NEXT: .loc 91; CHECK-NEXT: .Ltmp[[LABEL_UD:.*]]: 92; CHECK-NEXT: .Ltmp 93; CHECK-NEXT: r1 = *(u64 *)(r6 + 8) 94; CHECK-NEXT: .loc 95; CHECK-NEXT: .Ltmp 96; CHECK-NEXT: call cu 97 98; CHECK: .section .BTF 99; CHECK: .long [[STR_T:.*]] # BTF_KIND_STRUCT(id = [[ID:.*]]) 100 101; CHECK: .byte 116 # string offset=[[STR_T]] 102; CHECK: .ascii "0:0" # string offset=[[STR_UB:.*]] 103; CHECK: .ascii "0:1" # string offset=[[STR_UH:.*]] 104; CHECK: .ascii "0:2" # string offset=[[STR_UW:.*]] 105; CHECK: .ascii "0:3" # string offset=[[STR_UD:.*]] 106 107; CHECK: # FieldReloc 108; CHECK: .long .Ltmp[[LABEL_UB]] 109; CHECK-NEXT: .long [[ID]] 110; CHECK-NEXT: .long [[STR_UB]] 111; CHECK-NEXT: .long 0 112; CHECK: .long .Ltmp[[LABEL_UH]] 113; CHECK-NEXT: .long [[ID]] 114; CHECK-NEXT: .long [[STR_UH]] 115; CHECK-NEXT: .long 0 116; CHECK: .long .Ltmp[[LABEL_UW]] 117; CHECK-NEXT: .long [[ID]] 118; CHECK-NEXT: .long [[STR_UW]] 119; CHECK-NEXT: .long 0 120; CHECK: .long .Ltmp[[LABEL_UD]] 121; CHECK-NEXT: .long [[ID]] 122; CHECK-NEXT: .long [[STR_UD]] 123; CHECK-NEXT: .long 0 124 125declare !dbg !48 dso_local void @cu(i64 noundef) local_unnamed_addr #2 126 127; Function Attrs: nofree nosync nounwind memory(none) 128declare ptr @llvm.bpf.passthrough.p0.p0(i32, ptr) #3 129 130; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 131declare void @llvm.dbg.value(metadata, metadata, metadata) #4 132 133attributes #0 = { "btf_ama" } 134attributes #1 = { nounwind "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 135attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } 136attributes #3 = { nofree nosync nounwind memory(none) } 137attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } 138attributes #5 = { nounwind } 139 140!llvm.dbg.cu = !{!11} 141!llvm.module.flags = !{!12, !13, !14, !15, !16} 142!llvm.ident = !{!17} 143 144!0 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t", file: !1, line: 1, size: 128, elements: !2) 145!1 = !DIFile(filename: "some.file", directory: "/some/dir", checksumkind: CSK_MD5, checksum: "d08c6eeba11118106c69a68932003da2") 146!2 = !{!3, !5, !7, !9} 147!3 = !DIDerivedType(tag: DW_TAG_member, name: "ub", scope: !0, file: !1, line: 2, baseType: !4, size: 8) 148!4 = !DIBasicType(name: "unsigned char", size: 8, encoding: DW_ATE_unsigned_char) 149!5 = !DIDerivedType(tag: DW_TAG_member, name: "uh", scope: !0, file: !1, line: 3, baseType: !6, size: 16, offset: 16) 150!6 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned) 151!7 = !DIDerivedType(tag: DW_TAG_member, name: "uw", scope: !0, file: !1, line: 4, baseType: !8, size: 32, offset: 32) 152!8 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 153!9 = !DIDerivedType(tag: DW_TAG_member, name: "ud", scope: !0, file: !1, line: 5, baseType: !10, size: 64, offset: 64) 154!10 = !DIBasicType(name: "unsigned long", size: 64, encoding: DW_ATE_unsigned) 155!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) 156!12 = !{i32 7, !"Dwarf Version", i32 5} 157!13 = !{i32 2, !"Debug Info Version", i32 3} 158!14 = !{i32 1, !"wchar_size", i32 4} 159!15 = !{i32 7, !"frame-pointer", i32 2} 160!16 = !{i32 7, !"debug-info-assignment-tracking", i1 true} 161!17 = !{!"clang version 18.0.0 (/home/eddy/work/llvm-project/clang 3810f2eb4382d5e2090ce5cd47f45379cb453c35)"} 162!18 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 20, type: !19, scopeLine: 20, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !11, retainedNodes: !23) 163!19 = !DISubroutineType(types: !20) 164!20 = !{null, !21} 165!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 64) 166!22 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !0) 167!23 = !{!24} 168!24 = !DILocalVariable(name: "t", arg: 1, scope: !18, file: !1, line: 20, type: !21) 169!25 = !DILocation(line: 0, scope: !18) 170!26 = !DILocation(line: 21, column: 9, scope: !18) 171!27 = !{!28, !29, i64 0} 172!28 = !{!"t", !29, i64 0, !31, i64 2, !32, i64 4, !33, i64 8} 173!29 = !{!"omnipotent char", !30, i64 0} 174!30 = !{!"Simple C/C++ TBAA"} 175!31 = !{!"short", !29, i64 0} 176!32 = !{!"int", !29, i64 0} 177!33 = !{!"long", !29, i64 0} 178!34 = !DILocation(line: 21, column: 6, scope: !18) 179!35 = !DILocation(line: 21, column: 3, scope: !18) 180!36 = !DILocation(line: 22, column: 9, scope: !18) 181!37 = !{!28, !31, i64 2} 182!38 = !DILocation(line: 22, column: 6, scope: !18) 183!39 = !DILocation(line: 22, column: 3, scope: !18) 184!40 = !DILocation(line: 23, column: 9, scope: !18) 185!41 = !{!28, !32, i64 4} 186!42 = !DILocation(line: 23, column: 6, scope: !18) 187!43 = !DILocation(line: 23, column: 3, scope: !18) 188!44 = !DILocation(line: 24, column: 9, scope: !18) 189!45 = !{!28, !33, i64 8} 190!46 = !DILocation(line: 24, column: 3, scope: !18) 191!47 = !DILocation(line: 25, column: 1, scope: !18) 192!48 = !DISubprogram(name: "cu", scope: !1, file: !1, line: 10, type: !49, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !51) 193!49 = !DISubroutineType(types: !50) 194!50 = !{null, !10} 195!51 = !{!52} 196!52 = !DILocalVariable(arg: 1, scope: !48, file: !1, line: 10, type: !10) 197