66 lines
3.5 KiB
LLVM
66 lines
3.5 KiB
LLVM
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; RUN: opt -O2 %s | llvm-dis > %t1
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; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
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; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
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; Source code:
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; #define _(x) (__builtin_preserve_access_index(x))
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; int get_value(const int *arg);
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; int test(int *arg) {
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; return get_value(_(&arg[4]));
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; }
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; Compilation flag:
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; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
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target triple = "bpf"
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; Function Attrs: nounwind
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define dso_local i32 @test(i32* %arg) local_unnamed_addr #0 !dbg !10 {
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entry:
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call void @llvm.dbg.value(metadata i32* %arg, metadata !14, metadata !DIExpression()), !dbg !15
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%0 = tail call i32* @llvm.preserve.array.access.index.p0i32.p0i32(i32* %arg, i32 0, i32 4), !dbg !16, !llvm.preserve.access.index !4
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%call = tail call i32 @get_value(i32* %0) #4, !dbg !17
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ret i32 %call, !dbg !18
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}
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; CHECK: r1 += 16
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; CHECK: call get_value
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; CHECK: .section .BTF.ext,"",@progbits
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; CHECK-NOT: .long 16 # FieldReloc
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declare dso_local i32 @get_value(i32*) local_unnamed_addr #1
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; Function Attrs: nounwind readnone
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declare i32* @llvm.preserve.array.access.index.p0i32.p0i32(i32*, i32, i32) #2
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #3
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attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind readnone speculatable willreturn }
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attributes #4 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!6, !7, !8}
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!llvm.ident = !{!9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)
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!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!6 = !{i32 2, !"Dwarf Version", i32 4}
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!7 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = !{i32 1, !"wchar_size", i32 4}
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!9 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"}
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!10 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 3, type: !11, scopeLine: 3, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !13)
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!11 = !DISubroutineType(types: !12)
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!12 = !{!5, !4}
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!13 = !{!14}
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!14 = !DILocalVariable(name: "arg", arg: 1, scope: !10, file: !1, line: 3, type: !4)
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!15 = !DILocation(line: 0, scope: !10)
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!16 = !DILocation(line: 4, column: 20, scope: !10)
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!17 = !DILocation(line: 4, column: 10, scope: !10)
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!18 = !DILocation(line: 4, column: 3, scope: !10)
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