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llvm-project/llvm/test/CodeGen/BPF/optnone-2.ll

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[BPF] Make BPFAbstractMemberAccessPass required Or else on optnone functions we get the following during instruction selection: fatal error: error in backend: Cannot select: intrinsic %llvm.preserve.struct.access.index Currently the -O0 pipeline doesn't properly run passes registered via TargetMachine::registerPassBuilderCallbacks(), so don't add that RUN line yet. That will be fixed after this. Reviewed By: yonghong-song Differential Revision: https://reviews.llvm.org/D89083
2020-10-07 11:28:43 +08:00
; RUN: opt < %s -passes='default<O2>' | llc -march=bpfel -filetype=asm -o /dev/null -
[NewPM] Provide method to run all pipeline callbacks, used for -O0 Some targets may add required passes via TargetMachine::registerPassBuilderCallbacks(). We need to run those even under -O0. As an example, BPFTargetMachine adds BPFAbstractMemberAccessPass, a required pass. This also allows us to clean up BackendUtil.cpp (and out-of-tree Rust usage of the NPM) by allowing us to share added passes like coroutines and sanitizers between -O0 and other optimization levels. Since callbacks may end up not adding passes, we need to check if the pass managers are empty before adding them, so PassManager now has an isEmpty() function. For example, polly adds callbacks but doesn't always add passes in those callbacks, so this is necessary to keep -debug-pass-manager tests' output from changing depending on if polly is enabled or not. Tests are a continuation of those added in https://reviews.llvm.org/D89083. Reviewed By: asbirlea, Meinersbur Differential Revision: https://reviews.llvm.org/D89158
2020-11-09 05:51:29 +08:00
; RUN: opt < %s -passes='default<O0>' | llc -march=bpfel -filetype=asm -o /dev/null -
[BPF] Make BPFAbstractMemberAccessPass required Or else on optnone functions we get the following during instruction selection: fatal error: error in backend: Cannot select: intrinsic %llvm.preserve.struct.access.index Currently the -O0 pipeline doesn't properly run passes registered via TargetMachine::registerPassBuilderCallbacks(), so don't add that RUN line yet. That will be fixed after this. Reviewed By: yonghong-song Differential Revision: https://reviews.llvm.org/D89083
2020-10-07 11:28:43 +08:00
; IR generated by
; $ cat /tmp/a.c
; struct ss { int a; };
; int foo() { return __builtin_btf_type_id(0, 0) + __builtin_preserve_type_info(*(struct ss *)0, 0); }
; $ clang -target bpf -g -S -emit-llvm t.c -Xclang -disable-llvm-passes /tmp/a.c
target triple = "bpf"
; Function Attrs: noinline nounwind optnone
define dso_local i32 @foo() #0 !dbg !9 {
entry:
%0 = call i32 @llvm.bpf.btf.type.id(i32 0, i64 0), !dbg !12, !llvm.preserve.access.index !4
%1 = call i32 @llvm.bpf.preserve.type.info(i32 1, i64 0), !dbg !13, !llvm.preserve.access.index !14
%add = add i32 %0, %1, !dbg !17
ret i32 %add, !dbg !18
}
; Function Attrs: nounwind readnone
declare i32 @llvm.bpf.btf.type.id(i32, i64) #1
; Function Attrs: nounwind readnone
declare i32 @llvm.bpf.preserve.type.info(i32, i64) #1
attributes #0 = { noinline nounwind optnone }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5, !6, !7}
!llvm.ident = !{!8}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "C:/src/tmp\\a.c", directory: "C:\\src\\llvm-project")
!2 = !{}
!3 = !{!4}
!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!5 = !{i32 7, !"Dwarf Version", i32 4}
!6 = !{i32 2, !"Debug Info Version", i32 3}
!7 = !{i32 1, !"wchar_size", i32 4}
!8 = !{!"clang version 12.0.0"}
!9 = distinct !DISubprogram(name: "foo", scope: !10, file: !10, line: 2, type: !11, scopeLine: 2, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!10 = !DIFile(filename: "C:/src/tmp/a.c", directory: "")
!11 = !DISubroutineType(types: !3)
!12 = !DILocation(line: 2, column: 21, scope: !9)
!13 = !DILocation(line: 2, column: 51, scope: !9)
!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "ss", file: !10, line: 1, size: 32, elements: !15)
!15 = !{!16}
!16 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !14, file: !10, line: 1, baseType: !4, size: 32)
!17 = !DILocation(line: 2, column: 49, scope: !9)
!18 = !DILocation(line: 2, column: 14, scope: !9)