| ; RUN: llc -mtriple=bpf -mcpu=v4 < %s | FileCheck -check-prefixes=CHECK %s |
| |
| ; Verify that BPFMISimplifyPatchable::checkADDrr correctly rewrites |
| ; load instructions with sign extension. |
| ; |
| ; Generated from the following source code: |
| ; struct t { |
| ; signed char sb; |
| ; signed short sh; |
| ; signed int sw; |
| ; } __attribute__((preserve_access_index)); |
| ; |
| ; extern void cs(signed long); |
| ; |
| ; void buz(volatile struct t *t) { |
| ; cs(t->sb); |
| ; cs(t->sh); |
| ; cs(t->sw); |
| ; } |
| ; |
| ; Using the following command: |
| ; clang -g -O2 -S -emit-llvm --target=bpf t.c -o t.ll |
| |
| @"llvm.t:0:0$0:0" = external global i64, !llvm.preserve.access.index !0 #0 |
| @"llvm.t:0:2$0:1" = external global i64, !llvm.preserve.access.index !0 #0 |
| @"llvm.t:0:4$0:2" = external global i64, !llvm.preserve.access.index !0 #0 |
| |
| ; Function Attrs: nounwind |
| define dso_local void @buz(ptr noundef %t) local_unnamed_addr #1 !dbg !16 { |
| entry: |
| call void @llvm.dbg.value(metadata ptr %t, metadata !22, metadata !DIExpression()), !dbg !23 |
| %0 = load i64, ptr @"llvm.t:0:0$0:0", align 8 |
| %1 = getelementptr i8, ptr %t, i64 %0 |
| %2 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 0, ptr %1) |
| %3 = load volatile i8, ptr %2, align 4, !dbg !24, !tbaa !25 |
| %conv = sext i8 %3 to i64, !dbg !31 |
| tail call void @cs(i64 noundef %conv) #5, !dbg !32 |
| %4 = load i64, ptr @"llvm.t:0:2$0:1", align 8 |
| %5 = getelementptr i8, ptr %t, i64 %4 |
| %6 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 1, ptr %5) |
| %7 = load volatile i16, ptr %6, align 2, !dbg !33, !tbaa !34 |
| %conv1 = sext i16 %7 to i64, !dbg !35 |
| tail call void @cs(i64 noundef %conv1) #5, !dbg !36 |
| %8 = load i64, ptr @"llvm.t:0:4$0:2", align 8 |
| %9 = getelementptr i8, ptr %t, i64 %8 |
| %10 = tail call ptr @llvm.bpf.passthrough.p0.p0(i32 2, ptr %9) |
| %11 = load volatile i32, ptr %10, align 4, !dbg !37, !tbaa !38 |
| %conv2 = sext i32 %11 to i64, !dbg !39 |
| tail call void @cs(i64 noundef %conv2) #5, !dbg !40 |
| ret void, !dbg !41 |
| } |
| |
| ; CHECK: buz: |
| ; CHECK: prologue_end |
| ; CHECK-NEXT: .Ltmp[[LABEL_SB:.*]]: |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: r1 = *(s8 *)(r6 + 0) |
| ; CHECK-NEXT: .loc |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: call cs |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: .loc |
| ; CHECK-NEXT: .Ltmp[[LABEL_SH:.*]]: |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: r1 = *(s16 *)(r6 + 2) |
| ; CHECK-NEXT: .loc |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: call cs |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: .loc |
| ; CHECK-NEXT: .Ltmp[[LABEL_SW:.*]]: |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: r1 = *(s32 *)(r6 + 4) |
| ; CHECK-NEXT: .loc |
| ; CHECK-NEXT: .Ltmp |
| ; CHECK-NEXT: call cs |
| |
| ; CHECK: .section .BTF |
| ; CHECK: .long [[T:.*]] # BTF_KIND_STRUCT(id = [[ID:.*]]) |
| |
| ; CHECK: .byte 116 # string offset=[[T]] |
| ; CHECK: .ascii "0:0" # string offset=[[STR_SB:.*]] |
| ; CHECK: .ascii "0:1" # string offset=[[STR_SH:.*]] |
| ; CHECK: .ascii "0:2" # string offset=[[STR_SW:.*]] |
| |
| ; CHECK: # FieldReloc |
| ; CHECK: .long .Ltmp[[LABEL_SB]] |
| ; CHECK-NEXT: .long [[ID]] |
| ; CHECK-NEXT: .long [[STR_SB]] |
| ; CHECK-NEXT: .long 0 |
| ; CHECK: .long .Ltmp[[LABEL_SH]] |
| ; CHECK-NEXT: .long [[ID]] |
| ; CHECK-NEXT: .long [[STR_SH]] |
| ; CHECK-NEXT: .long 0 |
| ; CHECK: .long .Ltmp[[LABEL_SW]] |
| ; CHECK-NEXT: .long [[ID]] |
| ; CHECK-NEXT: .long [[STR_SW]] |
| ; CHECK-NEXT: .long 0 |
| |
| declare !dbg !42 dso_local void @cs(i64 noundef) local_unnamed_addr #2 |
| |
| ; Function Attrs: nofree nosync nounwind memory(none) |
| declare ptr @llvm.bpf.passthrough.p0.p0(i32, ptr) #3 |
| |
| ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #4 |
| |
| attributes #0 = { "btf_ama" } |
| attributes #1 = { nounwind "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } |
| attributes #2 = { "frame-pointer"="all" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } |
| attributes #3 = { nofree nosync nounwind memory(none) } |
| attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } |
| attributes #5 = { nounwind } |
| |
| !llvm.dbg.cu = !{!9} |
| !llvm.module.flags = !{!10, !11, !12, !13, !14} |
| !llvm.ident = !{!15} |
| |
| !0 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t", file: !1, line: 1, size: 64, elements: !2) |
| !1 = !DIFile(filename: "some.file", directory: "/some/dir", checksumkind: CSK_MD5, checksum: "2316ba0d3e8def5d297ad400e78b1782") |
| !2 = !{!3, !5, !7} |
| !3 = !DIDerivedType(tag: DW_TAG_member, name: "sb", scope: !0, file: !1, line: 6, baseType: !4, size: 8) |
| !4 = !DIBasicType(name: "signed char", size: 8, encoding: DW_ATE_signed_char) |
| !5 = !DIDerivedType(tag: DW_TAG_member, name: "sh", scope: !0, file: !1, line: 7, baseType: !6, size: 16, offset: 16) |
| !6 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed) |
| !7 = !DIDerivedType(tag: DW_TAG_member, name: "sw", scope: !0, file: !1, line: 8, baseType: !8, size: 32, offset: 32) |
| !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !9 = 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) |
| !10 = !{i32 7, !"Dwarf Version", i32 5} |
| !11 = !{i32 2, !"Debug Info Version", i32 3} |
| !12 = !{i32 1, !"wchar_size", i32 4} |
| !13 = !{i32 7, !"frame-pointer", i32 2} |
| !14 = !{i32 7, !"debug-info-assignment-tracking", i1 true} |
| !15 = !{!"clang version 18.0.0 (/home/eddy/work/llvm-project/clang 3810f2eb4382d5e2090ce5cd47f45379cb453c35)"} |
| !16 = distinct !DISubprogram(name: "buz", scope: !1, file: !1, line: 27, type: !17, scopeLine: 27, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !9, retainedNodes: !21) |
| !17 = !DISubroutineType(types: !18) |
| !18 = !{null, !19} |
| !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64) |
| !20 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !0) |
| !21 = !{!22} |
| !22 = !DILocalVariable(name: "t", arg: 1, scope: !16, file: !1, line: 27, type: !19) |
| !23 = !DILocation(line: 0, scope: !16) |
| !24 = !DILocation(line: 28, column: 9, scope: !16) |
| !25 = !{!26, !27, i64 0} |
| !26 = !{!"t", !27, i64 0, !29, i64 2, !30, i64 4} |
| !27 = !{!"omnipotent char", !28, i64 0} |
| !28 = !{!"Simple C/C++ TBAA"} |
| !29 = !{!"short", !27, i64 0} |
| !30 = !{!"int", !27, i64 0} |
| !31 = !DILocation(line: 28, column: 6, scope: !16) |
| !32 = !DILocation(line: 28, column: 3, scope: !16) |
| !33 = !DILocation(line: 29, column: 9, scope: !16) |
| !34 = !{!26, !29, i64 2} |
| !35 = !DILocation(line: 29, column: 6, scope: !16) |
| !36 = !DILocation(line: 29, column: 3, scope: !16) |
| !37 = !DILocation(line: 30, column: 9, scope: !16) |
| !38 = !{!26, !30, i64 4} |
| !39 = !DILocation(line: 30, column: 6, scope: !16) |
| !40 = !DILocation(line: 30, column: 3, scope: !16) |
| !41 = !DILocation(line: 31, column: 1, scope: !16) |
| !42 = !DISubprogram(name: "cs", scope: !1, file: !1, line: 11, type: !43, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !46) |
| !43 = !DISubroutineType(types: !44) |
| !44 = !{null, !45} |
| !45 = !DIBasicType(name: "long", size: 64, encoding: DW_ATE_signed) |
| !46 = !{!47} |
| !47 = !DILocalVariable(arg: 1, scope: !42, file: !1, line: 11, type: !45) |
