1 ; RUN: mkdir -p %t && cd %t
2 ; RUN: opt < %s -passes=insert-gcov-profiling -S | FileCheck %s
4 ; CHECK: @__llvm_gcov_ctr = internal global [1 x i64] zeroinitializer
6 ;; If an indirectbr critical edge cannot be split, ignore it.
7 ;; The edge will not be profiled.
8 ; CHECK-LABEL: @cannot_split(
9 ; CHECK: indirect.preheader:
10 ; CHECK-NEXT: load {{.*}} @__llvm_gcov_ctr
11 ; CHECK-NOT: load {{.*}} @__llvm_gcov_ctr
13 define dso_local i32 @cannot_split(ptr nocapture readonly %p) #0 !dbg !7 {
15 %targets = alloca <2 x ptr>, align 16
16 store <2 x ptr> <ptr blockaddress(@cannot_split, %indirect), ptr blockaddress(@cannot_split, %end)>, ptr %targets, align 16, !dbg !9
17 br label %for.cond, !dbg !14
19 for.cond: ; preds = %for.cond, %entry
20 %p.addr.0 = phi ptr [ %p, %entry ], [ %incdec.ptr, %for.cond ]
21 %0 = load i8, ptr %p.addr.0, align 1, !dbg !15
22 %cmp = icmp eq i8 %0, 7, !dbg !17
23 %incdec.ptr = getelementptr inbounds i8, ptr %p.addr.0, i64 1, !dbg !18
24 br i1 %cmp, label %indirect.preheader, label %for.cond, !dbg !15, !llvm.loop !19
26 indirect.preheader: ; preds = %for.cond
27 %1 = load i8, ptr %incdec.ptr, align 1, !dbg !21
28 %idxprom = sext i8 %1 to i64, !dbg !21
29 %arrayidx4 = getelementptr inbounds <2 x ptr>, ptr %targets, i64 0, i64 %idxprom, !dbg !21
30 %2 = load ptr, ptr %arrayidx4, align 8, !dbg !21
33 indirect: ; preds = %indirect.preheader, %indirect
34 indirectbr ptr %2, [label %indirect, label %end]
37 ; For this test we do not want critical edges split. Adding a 2nd `indirectbr`
39 indirectbr ptr %2, [label %indirect, label %end]
41 end: ; preds = %indirect
45 attributes #0 = { norecurse nounwind readonly uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "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"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
48 !llvm.module.flags = !{!3, !4, !5}
50 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, splitDebugInlining: false, nameTableKind: None)
51 !1 = !DIFile(filename: "a.c", directory: "/tmp/c")
53 !3 = !{i32 7, !"Dwarf Version", i32 4}
54 !4 = !{i32 2, !"Debug Info Version", i32 3}
55 !5 = !{i32 1, !"wchar_size", i32 4}
56 !7 = distinct !DISubprogram(name: "cannot_split", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
57 !8 = !DISubroutineType(types: !2)
58 !9 = !DILocation(line: 3, column: 14, scope: !7)
59 !14 = !DILocation(line: 5, column: 3, scope: !7)
60 !15 = !DILocation(line: 6, column: 9, scope: !7)
61 !17 = !DILocation(line: 6, column: 12, scope: !7)
62 !18 = !DILocation(line: 5, column: 12, scope: !7)
63 !19 = distinct !{!19, !14, !20}
64 !20 = !DILocation(line: 9, column: 5, scope: !7)
65 !21 = !DILocation(line: 0, scope: !7)
66 !22 = !DILocation(line: 11, column: 3, scope: !7)