Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/DebugInfo/Mips/fn-call-line.ll

@@ -0,0 +1,83 @@
+; RUN: llc -mtriple=mips-linux-gnu -filetype=asm -asm-verbose=0 -O0 -relocation-model=pic < %s | FileCheck %s
+; RUN: llc -mtriple=mips-linux-gnu -filetype=obj -O0 < %s | llvm-dwarfdump -debug-line - | FileCheck %s --check-prefix=INT
+
+; Mips used to generate 'jumpy' debug line info around calls. The address
+; calculation for each call to f1() would share the same line info so it would
+; emit output of the form:
+;   .loc $first_call_location
+;   .. address calculation ..
+;   .. function call ..
+;   .. address calculation ..
+;   .loc $second_call_location
+;   .. function call ..
+;   .loc $first_call_location
+;   .. address calculation ..
+;   .loc $third_call_location
+;   .. function call ..
+;   ...
+; which would cause confusing stepping behaviour for the end user.
+;
+; This test checks that we emit more user friendly debug line info of the form:
+;   .loc $first_call_location
+;   .. address calculation ..
+;   .. function call ..
+;   .loc $second_call_location
+;   .. address calculation ..
+;   .. function call ..
+;   .loc $third_call_location
+;   .. address calculation ..
+;   .. function call ..
+;   ...
+;
+; Generated with clang from fn-call-line.c:
+; void f1();
+; void f2() {
+;   f1();
+;   f1();
+; }
+
+; CHECK: .loc	1 3 3
+; CHECK-NOT: .loc
+; CHECK: %call16(f1) 
+; CHECK-NOT: .loc
+; CHECK: .loc	1 4 3
+; CHECK-NOT: .loc
+; CHECK: %call16(f1) 
+
+; INT: {{^}}Address
+; INT: -----
+; INT-NEXT: 2 0 1 0 0 is_stmt{{$}}
+; INT-NEXT: 3 3 1 0 0 is_stmt prologue_end{{$}}
+; INT-NEXT: 4 3 1 0 0 is_stmt{{$}}
+
+
+; Function Attrs: nounwind uwtable
+define void @f2() #0 !dbg !4 {
+entry:
+  call void (...) @f1(), !dbg !11
+  call void (...) @f1(), !dbg !12
+  ret void, !dbg !13
+}
+
+declare void @f1(...) #1
+
+attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!8, !9}
+!llvm.ident = !{!10}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.7.0 (trunk 226641)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
+!1 = !DIFile(filename: "fn-call-line.c", directory: "/tmp/dbginfo")
+!2 = !{}
+!4 = distinct !DISubprogram(name: "f2", line: 2, isLocal: false, isDefinition: true, isOptimized: false, unit: !0, scopeLine: 2, file: !1, scope: !5, type: !6, variables: !2)
+!5 = !DIFile(filename: "fn-call-line.c", directory: "/tmp/dbginfo")
+!6 = !DISubroutineType(types: !7)
+!7 = !{null}
+!8 = !{i32 2, !"Dwarf Version", i32 4}
+!9 = !{i32 2, !"Debug Info Version", i32 3}
+!10 = !{!"clang version 3.7.0 (trunk 226641)"}
+!11 = !DILocation(line: 3, column: 3, scope: !4)
+!12 = !DILocation(line: 4, column: 3, scope: !4)
+!13 = !DILocation(line: 5, column: 1, scope: !4)