[llvm] r247777 - Copy back Inputs/gmlt.ll. Also DebugInfo/X86/gmlt.test uses it.

Tue Sep 15 23:22:55 PDT 2015

Author: chapuni
Date: Wed Sep 16 01:22:55 2015
New Revision: 247777

URL: http://llvm.org/viewvc/llvm-project?rev=247777&view=rev
Log:
Copy back Inputs/gmlt.ll. Also DebugInfo/X86/gmlt.test uses it.

Added:
    llvm/trunk/test/DebugInfo/Inputs/gmlt.ll

Added: llvm/trunk/test/DebugInfo/Inputs/gmlt.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/Inputs/gmlt.ll?rev=247777&view=auto
==============================================================================

--- llvm/trunk/test/DebugInfo/Inputs/gmlt.ll (added)
+++ llvm/trunk/test/DebugInfo/Inputs/gmlt.ll Wed Sep 16 01:22:55 2015
@@ -0,0 +1,153 @@
+; REQUIRES: object-emission
+; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s
+
+; Generated from the following source compiled with clang++ -gmlt:
+; void f1() {}
+; void __attribute__((section("__TEXT,__bar"))) f2() {}
+; void __attribute__((always_inline)) f3() { f1(); }
+; void f4() { f3(); }
+
+; Check that
+;  * -gmlt includes no DW_TAG_subprograms for subprograms without inlined
+;    subroutines.
+;  * yet still produces DW_AT_ranges and a range list in debug_ranges that
+;    describes those subprograms
+
+; CHECK: DW_TAG_compile_unit
+; CHECK:   DW_AT_ranges [DW_FORM_sec_offset] (0x00000000
+; CHECK-NOT: {{DW_TAG|NULL}}
+
+; Omitting the subprograms without inlined subroutines is not possible
+; currently on Darwin as dsymutil will drop the whole CU if it has no subprograms
+; (which happens with this optimization if there are no inlined subroutines).
+
+; DARWIN:  DW_TAG_subprogram
+; DARWIN-NOT: DW_TAG
+; DARWIN:    DW_AT_name {{.*}} "f1"
+; DARWIN-NOT: {{DW_TAG|NULL}}
+; DARWIN:  DW_TAG_subprogram
+; DARWIN-NOT: DW_TAG
+; DARWIN:    DW_AT_name {{.*}} "f2"
+; DARWIN-NOT: {{DW_TAG|NULL}}
+; DARWIN:  DW_TAG_subprogram
+; DARWIN-NOT: DW_TAG
+; Can't check the abstract_origin value across the DARWIN/CHECK checking and
+; ordering, so don't bother - just trust me, it refers to f3 down there.
+; DARWIN:    DW_AT_abstract_origin
+; DARWIN-NOT: {{DW_TAG|NULL}}
+
+
+; FIXME: Emitting separate abstract definitions is inefficient when we could
+; just attach the DW_AT_name to the inlined_subroutine directly. Except that
+; would produce many string relocations. Implement string indexing in the
+; skeleton CU to address the relocation problem, then remove abstract
+; definitions from -gmlt here.
+
+; CHECK: DW_TAG_subprogram
+; CHECK-NEXT:     DW_AT_name {{.*}} "f3"
+
+; FIXME: We don't really need DW_AT_inline, consumers can ignore this due to
+; the absence of high_pc/low_pc/ranges and know that they just need it for
+; retrieving the name of a concrete inlined instance
+
+; CHECK-NOT: {{DW_TAG|DW_AT|NULL}}
+
+; Check that we only provide the minimal attributes on a subprogram to save space.
+; CHECK:   DW_TAG_subprogram
+; CHECK-NEXT:     DW_AT_low_pc
+; CHECK-NEXT:     DW_AT_high_pc
+; CHECK-NEXT:     DW_AT_name
+; CHECK-NOT: {{DW_TAG|DW_AT}}
+; CHECK:     DW_TAG_inlined_subroutine
+
+; As mentioned above - replace DW_AT_abstract_origin with DW_AT_name to save
+; space once we have support for string indexing in non-dwo sections
+
+; CHECK-NEXT:       DW_AT_abstract_origin {{.*}} "f3"
+; CHECK-NEXT:       DW_AT_low_pc
+; CHECK-NEXT:       DW_AT_high_pc
+; CHECK-NEXT:       DW_AT_call_file
+; CHECK-NEXT:       DW_AT_call_line
+
+; Make sure we don't have any other subprograms here (subprograms with no
+; inlined subroutines are omitted by design to save space)
+
+; CHECK-NOT: {{DW_TAG|DW_AT}}
+; CHECK: NULL
+; CHECK-NOT: {{DW_TAG|DW_AT}}
+; CHECK: NULL
+
+
+; CHECK: .debug_ranges contents:
+
+; ... some addresses (depends on platform (such as platforms with function
+; reordering in the linker), and looks wonky on platforms with zero values
+; written in relocation places (dumper needs to	be fixed to read the
+; relocations rather than interpret that as the end of a range list))
+
+; CHECK: 00000000 <End of list>
+
+
+; Check that we don't emit any pubnames or pubtypes under -gmlt
+; CHECK: .debug_pubnames contents:
+; CHECK-NOT: Offset
+
+; CHECK: .debug_pubtypes contents:
+; CHECK-NOT: Offset
+
+; CHECK: .apple{{.*}} contents:
+
+; Function Attrs: nounwind uwtable
+define void @_Z2f1v() #0 {
+entry:
+  ret void, !dbg !13
+}
+
+; Function Attrs: nounwind uwtable
+define void @_Z2f2v() #0 section "__TEXT,__bar" {
+entry:
+  ret void, !dbg !14
+}
+
+; Function Attrs: alwaysinline nounwind uwtable
+define void @_Z2f3v() #1 {
+entry:
+  call void @_Z2f1v(), !dbg !15
+  ret void, !dbg !16
+}
+
+; Function Attrs: nounwind uwtable
+define void @_Z2f4v() #0 {
+entry:
+  call void @_Z2f1v() #2, !dbg !17
+  ret void, !dbg !19
+}
+
+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 = { alwaysinline 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 #2 = { nounwind }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!10, !11}
+!llvm.ident = !{!12}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 ", isOptimized: false, emissionKind: 2, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
+!1 = !DIFile(filename: "gmlt.cpp", directory: "/tmp/dbginfo")
+!2 = !{}
+!3 = !{!4, !7, !8, !9}
+!4 = distinct !DISubprogram(name: "f1", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !5, type: !6, function: void ()* @_Z2f1v, variables: !2)
+!5 = !DIFile(filename: "gmlt.cpp", directory: "/tmp/dbginfo")
+!6 = !DISubroutineType(types: !2)
+!7 = distinct !DISubprogram(name: "f2", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 2, file: !1, scope: !5, type: !6, function: void ()* @_Z2f2v, variables: !2)
+!8 = distinct !DISubprogram(name: "f3", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, function: void ()* @_Z2f3v, variables: !2)
+!9 = distinct !DISubprogram(name: "f4", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !1, scope: !5, type: !6, function: void ()* @_Z2f4v, variables: !2)
+!10 = !{i32 2, !"Dwarf Version", i32 4}
+!11 = !{i32 2, !"Debug Info Version", i32 3}
+!12 = !{!"clang version 3.6.0 "}
+!13 = !DILocation(line: 1, column: 12, scope: !4)
+!14 = !DILocation(line: 2, column: 53, scope: !7)
+!15 = !DILocation(line: 3, column: 44, scope: !8)
+!16 = !DILocation(line: 3, column: 50, scope: !8)
+!17 = !DILocation(line: 3, column: 44, scope: !8, inlinedAt: !18)
+!18 = !DILocation(line: 4, column: 13, scope: !9)
+!19 = !DILocation(line: 4, column: 19, scope: !9)


