304f1d59ca
This switches everything to use the memory attribute proposed in https://discourse.llvm.org/t/rfc-unify-memory-effect-attributes/65579. The old argmemonly, inaccessiblememonly and inaccessiblemem_or_argmemonly attributes are dropped. The readnone, readonly and writeonly attributes are restricted to parameters only. The old attributes are auto-upgraded both in bitcode and IR. The bitcode upgrade is a policy requirement that has to be retained indefinitely. The IR upgrade is mainly there so it's not necessary to update all tests using memory attributes in this patch, which is already large enough. We could drop that part after migrating tests, or retain it longer term, to make it easier to import IR from older LLVM versions. High-level Function/CallBase APIs like doesNotAccessMemory() or setDoesNotAccessMemory() are mapped transparently to the memory attribute. Code that directly manipulates attributes (e.g. via AttributeList) on the other hand needs to switch to working with the memory attribute instead. Differential Revision: https://reviews.llvm.org/D135780
114 lines
4.7 KiB
LLVM
114 lines
4.7 KiB
LLVM
; REQUIRES: x86_64-linux
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; RUN: opt < %s -passes=pseudo-probe -function-sections -S -o %t
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; RUN: FileCheck %s < %t --check-prefix=CHECK-IL
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; RUN: llc %t -stop-after=pseudo-probe-inserter -o - | FileCheck %s --check-prefix=CHECK-MIR
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; RUN: llc %t -function-sections -filetype=asm -o %t1
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; RUN: FileCheck %s < %t1 --check-prefix=CHECK-ASM
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; RUN: llc %t -function-sections -filetype=obj -o %t2
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; RUN: llvm-objdump --section-headers %t2 | FileCheck %s --check-prefix=CHECK-OBJ
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; RUN: llvm-mc %t1 -filetype=obj -o %t3
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; RUN: llvm-objdump --section-headers %t3 | FileCheck %s --check-prefix=CHECK-OBJ
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;; Check the generation of pseudoprobe intrinsic call.
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@a = dso_local global i32 0, align 4
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define void @foo(i32 %x) !dbg !3 {
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bb0:
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%cmp = icmp eq i32 %x, 0
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; CHECK-IL: call void @llvm.pseudoprobe(i64 [[#GUID:]], i64 1, i32 0, i64 -1), !dbg ![[#FAKELINE:]]
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; CHECK-MIR: PSEUDO_PROBE [[#GUID:]], 1, 0, 0
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; CHECK-ASM: .pseudoprobe [[#GUID:]] 1 0 0 foo
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br i1 %cmp, label %bb1, label %bb2
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bb1:
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; CHECK-IL: call void @llvm.pseudoprobe(i64 [[#GUID:]], i64 2, i32 0, i64 -1), !dbg ![[#FAKELINE]]
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; CHECK-MIR: PSEUDO_PROBE [[#GUID]], 3, 0, 0
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; CHECK-MIR: PSEUDO_PROBE [[#GUID]], 4, 0, 0
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; CHECK-ASM: .pseudoprobe [[#GUID]] 3 0 0 foo
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; CHECK-ASM: .pseudoprobe [[#GUID]] 4 0 0 foo
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store i32 6, ptr @a, align 4
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br label %bb3
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bb2:
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; CHECK-IL: call void @llvm.pseudoprobe(i64 [[#GUID:]], i64 3, i32 0, i64 -1), !dbg ![[#FAKELINE]]
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; CHECK-MIR: PSEUDO_PROBE [[#GUID]], 2, 0, 0
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; CHECK-MIR: PSEUDO_PROBE [[#GUID]], 4, 0, 0
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; CHECK-ASM: .pseudoprobe [[#GUID]] 2 0 0 foo
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; CHECK-ASM: .pseudoprobe [[#GUID]] 4 0 0 foo
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store i32 8, ptr @a, align 4
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br label %bb3
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bb3:
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; CHECK-IL: call void @llvm.pseudoprobe(i64 [[#GUID]], i64 4, i32 0, i64 -1), !dbg ![[#REALLINE:]]
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ret void, !dbg !12
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}
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declare void @bar(i32 %x)
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define internal void @foo2(ptr %f) !dbg !4 {
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entry:
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; CHECK-IL: call void @llvm.pseudoprobe(i64 [[#GUID2:]], i64 1, i32 0, i64 -1)
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; CHECK-MIR: PSEUDO_PROBE [[#GUID2:]], 1, 0, 0
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; CHECK-ASM: .pseudoprobe [[#GUID2:]] 1 0 0 foo2
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; Check pseudo_probe metadata attached to the indirect call instruction.
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; CHECK-IL: call void %f(i32 1), !dbg ![[#PROBE0:]]
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; CHECK-MIR: PSEUDO_PROBE [[#GUID2]], 2, 1, 0
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; CHECK-ASM: .pseudoprobe [[#GUID2]] 2 1 0 foo2
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call void %f(i32 1), !dbg !13
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; Check pseudo_probe metadata attached to the direct call instruction.
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; CHECK-IL: call void @bar(i32 1), !dbg ![[#PROBE1:]]
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; CHECK-MIR: PSEUDO_PROBE [[#GUID2]], 3, 2, 0
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; CHECK-ASM: .pseudoprobe [[#GUID2]] 3 2 0 foo2
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call void @bar(i32 1)
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ret void
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}
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; CHECK-IL: Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: readwrite)
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; CHECK-IL-NEXT: declare void @llvm.pseudoprobe(i64, i64, i32, i64)
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; CHECK-IL: ![[#FOO:]] = distinct !DISubprogram(name: "foo"
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; CHECK-IL: ![[#FAKELINE]] = !DILocation(line: 0, scope: ![[#FOO]])
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; CHECK-IL: ![[#REALLINE]] = !DILocation(line: 2, scope: ![[#FOO]])
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; CHECK-IL: ![[#PROBE0]] = !DILocation(line: 2, column: 20, scope: ![[#SCOPE0:]])
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;; A discriminator of 67108887 which is 0x7200017 in hexdecimal, stands for a direct call probe
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;; with an index of 2.
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; CHECK-IL: ![[#SCOPE0]] = !DILexicalBlockFile(scope: ![[#]], file: ![[#]], discriminator: 119537687)
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; CHECK-IL: ![[#PROBE1]] = !DILocation(line: 0, scope: ![[#SCOPE1:]])
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;; A discriminator of 186646559 which is 0xb20001f in hexdecimal, stands for a direct call probe
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;; with an index of 3.
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; CHECK-IL: ![[#SCOPE1]] = !DILexicalBlockFile(scope: ![[#]], file: ![[#]], discriminator: 186646559)
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; Check the generation of .pseudo_probe_desc section
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; CHECK-ASM: .section .pseudo_probe_desc,"G",@progbits,.pseudo_probe_desc_foo,comdat
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; CHECK-ASM-NEXT: .quad [[#GUID]]
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; CHECK-ASM-NEXT: .quad [[#HASH:]]
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; CHECK-ASM-NEXT: .byte 3
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; CHECK-ASM-NEXT: .ascii "foo"
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; CHECK-ASM-NEXT: .section .pseudo_probe_desc,"G",@progbits,.pseudo_probe_desc_foo2,comdat
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; CHECK-ASM-NEXT: .quad [[#GUID2]]
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; CHECK-ASM-NEXT: .quad [[#HASH2:]]
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; CHECK-ASM-NEXT: .byte 4
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; CHECK-ASM-NEXT: .ascii "foo2"
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; CHECK-OBJ-COUNT-2: .pseudo_probe_desc
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; CHECK-OBJ: .pseudo_probe
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; CHECK-OBJ-NOT: .rela.pseudo_probe
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
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!1 = !DIFile(filename: "test.c", directory: "")
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!2 = !{}
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!3 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !5, unit: !0, retainedNodes: !2)
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!4 = distinct !DISubprogram(name: "foo2", scope: !1, file: !1, line: 2, type: !5, unit: !0, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7}
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!9 = !{i32 2, !"Dwarf Version", i32 4}
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!10 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = !{!"clang version 3.9.0"}
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!12 = !DILocation(line: 2, scope: !3)
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!13 = !DILocation(line: 2, column: 20, scope: !4)
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