d4d6b9a142
The dwarf discriminator field for pseudo probes is not supposed to be used until the first FS discriminator pass. Unfortunately there are always corner cases that accidientally set this field. For example, the inliner could set this field for an inlined instruction if the instruction does not come with any debug information. While fixing all such spots is possible, but for future-proff I'd like to enforce a general cleanup before assigning probes any FS discriminator. Reviewed By: wenlei Differential Revision: https://reviews.llvm.org/D150741
74 lines
3.1 KiB
LLVM
74 lines
3.1 KiB
LLVM
; REQUIRES: x86_64-linux
|
|
; REQUIRES: asserts
|
|
; RUN: llc -enable-fs-discriminator -improved-fs-discriminator=false --debug-only=mirfs-discriminators < %s -o - 2>&1 | FileCheck %s --check-prefixes=V0
|
|
; RUN: llc -enable-fs-discriminator -improved-fs-discriminator=true --debug-only=mirfs-discriminators < %s -o - 2>&1 | FileCheck %s --check-prefixes=V1
|
|
|
|
; Check that fs-afdo discriminators are generated.
|
|
; V0: foo.c:7:3: add FS discriminator, from 0 -> 11264
|
|
; V0: foo.c:9:5: add FS discriminator, from 0 -> 11264
|
|
; V0: Num of FS Discriminators: 2
|
|
|
|
; V1: foo.c:7:3: add FS discriminator, from 0 -> 256
|
|
; V1: foo.c:9:5: add FS discriminator, from 0 -> 256
|
|
; V1: Num of FS Discriminators: 2
|
|
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
%struct.Node = type { ptr }
|
|
|
|
define i32 @foo(ptr readonly %node, ptr readnone %root) !dbg !6 {
|
|
entry:
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1), !dbg !8
|
|
%cmp = icmp eq ptr %node, %root, !dbg !8
|
|
br i1 %cmp, label %while.end4, label %while.cond1.preheader.lr.ph, !dbg !10
|
|
|
|
while.cond1.preheader.lr.ph:
|
|
%tobool = icmp eq ptr %node, null
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1), !dbg !11
|
|
br i1 %tobool, label %while.cond1.preheader.us.preheader, label %while.body2.preheader, !dbg !11
|
|
|
|
while.body2.preheader:
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1), !dbg !11
|
|
br label %while.body2, !dbg !11
|
|
|
|
while.cond1.preheader.us.preheader:
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 3, i32 0, i64 -1), !dbg !10
|
|
br label %while.cond1.preheader.us, !dbg !10
|
|
|
|
while.cond1.preheader.us:
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 3, i32 0, i64 -1), !dbg !10
|
|
br label %while.cond1.preheader.us, !dbg !10
|
|
|
|
while.body2:
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1), !dbg !11
|
|
br label %while.body2, !dbg !11
|
|
|
|
while.end4:
|
|
call void @llvm.pseudoprobe(i64 6699318081062747564, i64 4, i32 0, i64 -1), !dbg !12
|
|
ret i32 0, !dbg !12
|
|
}
|
|
|
|
declare void @llvm.pseudoprobe(i64, i64, i32, i64) #0
|
|
|
|
attributes #0 = { inaccessiblememonly nocallback nofree nosync nounwind willreturn }
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4}
|
|
!llvm.pseudo_probe_desc = !{!13}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, debugInfoForProfiling: true, emissionKind: LineTablesOnly)
|
|
!1 = !DIFile(filename: "foo.c", directory: "b/")
|
|
!2 = !{}
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!5 = !{}
|
|
!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 5, type: !7, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
|
|
!7 = !DISubroutineType(types: !2)
|
|
!8 = !DILocation(line: 7, column: 15, scope: !9)
|
|
;; The discriminator with value 2 is to test that it can be cleaned up by the first FS discriminator pass.
|
|
!9 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 2)
|
|
!10 = !DILocation(line: 7, column: 3, scope: !9)
|
|
!11 = !DILocation(line: 9, column: 5, scope: !9)
|
|
!12 = !DILocation(line: 14, column: 3, scope: !6)
|
|
!13 = !{i64 6699318081062747564, i64 138464321060, !"foo"}
|