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llvm-mirror/test/DebugInfo/COFF/simple.ll
Reid Kleckner 9569e05324 [codeview] Align symbol records to save 441MB during linking clang.pdb 
In PDBs, symbol records must be aligned to four bytes. However, in the
object file, symbol records may not be aligned. MSVC does not pad out
symbol records to make sure they are aligned. That means the linker has
to do extra work to insert the padding. Currently, LLD calculates the
required space with alignment, and copies each record one at a time
while padding them out to the correct size. It has a fast path that
avoids this copy when the records are already aligned.

This change fixes a bug in that codepath so that the copy is actually
saved, and tweaks LLVM's symbol record emission to align symbol records.
Here's how things compare when doing a plain clang Release+PDB build:
- objs are 0.65% bigger (negligible)
- link is 3.3% faster (negligible)
- saves allocating 441MB
- new LLD high water mark is ~1.05GB

llvm-svn: 349431
2018-12-18 01:14:05 +00:00

303 lines
12 KiB
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; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 -O0 < %s | FileCheck --check-prefix=X86 %s
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32-itanium -O0 < %s | FileCheck --check-prefix=X86 %s
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32-gnu -O0 < %s | FileCheck --check-prefix=X86 %s
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32 -o - -O0 < %s | llvm-mc -triple=i686-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview -section-symbols | FileCheck --check-prefix=OBJ32 %s
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32-itanium -o - -O0 < %s | llvm-mc -triple=i686-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview -section-symbols | FileCheck --check-prefix=OBJ32 %s
; RUN: llc -mcpu=core2 -mtriple=i686-pc-win32-gnu -o - -O0 < %s | llvm-mc -triple=i686-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview -section-symbols | FileCheck --check-prefix=OBJ32 %s
; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32 -O0 < %s | FileCheck --check-prefix=X64 %s
; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32-itanium -O0 < %s | FileCheck --check-prefix=X64 %s
; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32-gnu -O0 < %s | FileCheck --check-prefix=X64 %s
; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32 -o - -O0 < %s | llvm-mc -triple=x86_64-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview -section-symbols | FileCheck --check-prefix=OBJ64 %s
; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32-itanium -o - -O0 < %s | llvm-mc -triple=x86_64-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview -section-symbols | FileCheck --check-prefix=OBJ64 %s
; RUN: llc -mcpu=core2 -mtriple=x86_64-pc-win32-gnu -o - -O0 < %s | llvm-mc -triple=x86_64-pc-win32 -filetype=obj | llvm-readobj -s -sr -codeview -section-symbols | FileCheck --check-prefix=OBJ64 %s
; This LL file was generated by running clang on the following code:
; D:\test.c:
; 1 void g(void);
; 2
; 3 void f(void) {
; 4 g();
; 5 }
; X86-LABEL: _f:
; X86: # %bb.
; X86: .cv_file 1 "D:\\test.c" "F310AB26998CA831CBDF169E4EECACFA" 1
; X86: .cv_loc 0 1 4 2 # test.c:4:2
; X86: calll _g
; X86: .cv_loc 0 1 5 0 # test.c:5:0
; X86: ret
; X86: [[END_OF_F:Lfunc_end.*]]:
;
; X86-LABEL: .section .debug$S,"dr"
; X86-NEXT: .p2align 2
; X86-NEXT: .long 4
; Symbol subsection
; X86-NEXT: .long 241
; X86-NEXT: .long [[COMPILE_END:.*]]-[[COMPILE_START:.*]] #
; Compiler information record
; X86-NEXT: [[COMPILE_START]]:
; X86-NEXT: .short [[C1_END:.*]]-[[C1_START:.*]] #
; X86: [[C1_END]]:
; X86-NEXT: [[COMPILE_END]]:
; X86-NEXT: .p2align 2
; X86-NEXT: .cv_fpo_data _f
; X86-NEXT: .long 241 # Symbol subsection for f
; X86-NEXT: .long [[F1_END:.*]]-[[F1_START:.*]] # Subsection size
; X86-NEXT: [[F1_START]]:
; X86-NEXT: .short [[PROC_SEGMENT_END:.*]]-[[PROC_SEGMENT_START:.*]] #
; X86-NEXT: [[PROC_SEGMENT_START]]:
; X86-NEXT: .short 4423
; X86-NEXT: .long 0
; X86-NEXT: .long 0
; X86-NEXT: .long 0
; X86-NEXT: .long [[END_OF_F]]-_f
; X86-NEXT: .long 0
; X86-NEXT: .long 0
; X86-NEXT: .long 4098
; X86-NEXT: .secrel32 _f
; X86-NEXT: .secidx _f
; X86-NEXT: .byte 0
; X86-NEXT: .asciz "f"
; X86-NEXT: .p2align 2
; X86-NEXT: [[PROC_SEGMENT_END]]:
; X86-NEXT: .short [[FPROC_END:[^ ]*]]-[[FPROC_BEG:[^ ]*]] # Record length
; X86-NEXT: [[FPROC_BEG]]:
; X86-NEXT: .short 4114 # Record kind: S_FRAMEPROC
; X86-NEXT: .long 0 # FrameSize
; X86-NEXT: .long 0 # Padding
; X86-NEXT: .long 0 # Offset of padding
; X86-NEXT: .long 0 # Bytes of callee saved registers
; X86-NEXT: .long 0 # Exception handler offset
; X86-NEXT: .short 0 # Exception handler section
; X86-NEXT: .long 0 # Flags (defines frame register)
; X86-NEXT: .p2align 2
; X86-NEXT: [[FPROC_END]]:
; X86-NEXT: .short 2
; X86-NEXT: .short 4431
; X86-NEXT: [[F1_END]]:
; X86-NEXT: .p2align 2
; Line table
; X86-NEXT: .cv_linetable 0, _f, [[END_OF_F]]
; File index to string table offset subsection
; X86-NEXT: .cv_filechecksums
; String table
; X86-NEXT: .cv_stringtable
; OBJ32: Section {
; OBJ32: Name: .debug$S (2E 64 65 62 75 67 24 53)
; OBJ32: Characteristics [ (0x42300040)
; OBJ32: ]
; OBJ32: Relocations [
; OBJ32-NEXT: 0x44 IMAGE_REL_I386_DIR32NB _f
; OBJ32-NEXT: 0x90 IMAGE_REL_I386_SECREL _f
; OBJ32-NEXT: 0x94 IMAGE_REL_I386_SECTION _f
; OBJ32-NEXT: 0xC8 IMAGE_REL_I386_SECREL _f
; OBJ32-NEXT: 0xCC IMAGE_REL_I386_SECTION _f
; OBJ32-NEXT: ]
; OBJ32: Subsection [
; OBJ32-NEXT: SubSectionType: Symbols (0xF1)
; OBJ32: Compile3Sym
; OBJ32: ]
; OBJ32: Subsection [
; OBJ32-NEXT: SubSectionType: FrameData (0xF5)
; OBJ32: ]
; OBJ32: Subsection [
; OBJ32-NEXT: SubSectionType: Symbols (0xF1)
; OBJ32: {{.*}}Proc{{.*}}Sym {
; OBJ32: CodeSize: 0x6
; OBJ32: DisplayName: f
; OBJ32: LinkageName: _f
; OBJ32: }
; OBJ32: ProcEnd {
; OBJ32: }
; OBJ32-NEXT: ]
; OBJ32: Subsection [
; OBJ32: SubSectionType: FileChecksums (0xF4)
; OBJ32-NEXT: SubSectionSize: 0x18
; OBJ32-NEXT: FileChecksum {
; OBJ32-NEXT: Filename: D:\test.c (0x1)
; OBJ32-NEXT: ChecksumSize: 0x10
; OBJ32-NEXT: ChecksumKind: MD5 (0x1)
; OBJ32-NEXT: ChecksumBytes: (F3 10 AB 26 99 8C A8 31 CB DF 16 9E 4E EC AC FA)
; OBJ32-NEXT: }
; OBJ32-NEXT: ]
; OBJ32: FunctionLineTable [
; OBJ32-NEXT: Name: _f
; OBJ32-NEXT: Flags: 0x1
; OBJ32-NEXT: CodeSize: 0x6
; OBJ32-NEXT: FilenameSegment [
; OBJ32-NEXT: Filename: D:\test.c
; OBJ32-NEXT: +0x0 [
; OBJ32-NEXT: LineNumberStart: 4
; OBJ32-NEXT: LineNumberEndDelta: 0
; OBJ32-NEXT: IsStatement: No
; OBJ32-NEXT: ColStart: 2
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ]
; OBJ32-NEXT: +0x5 [
; OBJ32-NEXT: LineNumberStart: 5
; OBJ32-NEXT: LineNumberEndDelta: 0
; OBJ32-NEXT: IsStatement: No
; OBJ32-NEXT: ColStart: 0
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ]
; OBJ32-NEXT: ]
; OBJ32-NEXT: ]
; X64-LABEL: f:
; X64-NEXT: .L{{.*}}:{{$}}
; X64: .cv_file 1 "D:\\test.c" "F310AB26998CA831CBDF169E4EECACFA" 1
; X64: .cv_loc 0 1 3 0 # test.c:3:0
; X64: # %bb.
; X64: subq $40, %rsp
; X64: .cv_loc 0 1 4 2 # test.c:4:2
; X64-NEXT: callq g
; X64: .cv_loc 0 1 5 0 # test.c:5:0
; X64: addq $40, %rsp
; X64-NEXT: ret
; X64: [[END_OF_F:.?Lfunc_end.*]]:
;
; X64-LABEL: .section .debug$S,"dr"
; X64-NEXT: .p2align 2
; X64-NEXT: .long 4
; Symbol subsection
; X64-NEXT: .long 241
; X64-NEXT: .long [[COMPILE_END:.*]]-[[COMPILE_START:.*]] #
; Compiler information record
; X64-NEXT: [[COMPILE_START]]:
; X64-NEXT: .short [[C1_END:.*]]-[[C1_START:.*]] #
; X64: [[C1_END]]:
; X64-NEXT: [[COMPILE_END]]:
; X64-NEXT: .p2align 2
; X64-NEXT: .long 241 # Symbol subsection for f
; X64-NEXT: .long [[F1_END:.*]]-[[F1_START:.*]] # Subsection size
; X64-NEXT: [[F1_START]]:
; X64-NEXT: .short [[PROC_SEGMENT_END:.*]]-[[PROC_SEGMENT_START:.*]] #
; X64-NEXT: [[PROC_SEGMENT_START]]:
; X64-NEXT: .short 4423
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long [[END_OF_F]]-f
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long 4098
; X64-NEXT: .secrel32 f
; X64-NEXT: .secidx f
; X64-NEXT: .byte 0
; X64-NEXT: .asciz "f"
; X64-NEXT: .p2align 2
; X64-NEXT: [[PROC_SEGMENT_END]]:
; X64-NEXT: .short [[FPROC_END:[^ ]*]]-[[FPROC_BEG:[^ ]*]] # Record length
; X64-NEXT: [[FPROC_BEG]]:
; X64-NEXT: .short 4114 # Record kind: S_FRAMEPROC
; X64-NEXT: .long 40 # FrameSize
; X64-NEXT: .long 0 # Padding
; X64-NEXT: .long 0 # Offset of padding
; X64-NEXT: .long 0 # Bytes of callee saved registers
; X64-NEXT: .long 0 # Exception handler offset
; X64-NEXT: .short 0 # Exception handler section
; X64-NEXT: .long 81920 # Flags (defines frame register)
; X64-NEXT: .p2align 2
; X64-NEXT: [[FPROC_END]]:
; X64-NEXT: .short 2
; X64-NEXT: .short 4431
; X64-NEXT: [[F1_END]]:
; X64-NEXT: .p2align 2
; Line table
; X64-NEXT: .cv_linetable 0, f, [[END_OF_F]]
; File index to string table offset subsection
; X64-NEXT: .cv_filechecksums
; String table
; X64-NEXT: .cv_stringtable
; OBJ64: Section {
; OBJ64: Name: .debug$S (2E 64 65 62 75 67 24 53)
; OBJ64: Characteristics [ (0x42300040)
; OBJ64: ]
; OBJ64: Relocations [
; OBJ64-NEXT: 0x64 IMAGE_REL_AMD64_SECREL f
; OBJ64-NEXT: 0x68 IMAGE_REL_AMD64_SECTION f
; OBJ64-NEXT: 0x9C IMAGE_REL_AMD64_SECREL f
; OBJ64-NEXT: 0xA0 IMAGE_REL_AMD64_SECTION f
; OBJ64-NEXT: ]
; OBJ64: Subsection [
; OBJ64-NEXT: SubSectionType: Symbols (0xF1)
; OBJ64: {{.*}}Proc{{.*}}Sym {
; OBJ64: CodeSize: 0xE
; OBJ64: DisplayName: f
; OBJ64: LinkageName: f
; OBJ64: }
; OBJ64: ProcEnd {
; OBJ64: }
; OBJ64-NEXT: ]
; OBJ64: Subsection [
; OBJ64: SubSectionType: FileChecksums (0xF4)
; OBJ64-NEXT: SubSectionSize: 0x18
; OBJ64-NEXT: FileChecksum {
; OBJ64-NEXT: Filename: D:\test.c (0x1)
; OBJ64-NEXT: ChecksumSize: 0x10
; OBJ64-NEXT: ChecksumKind: MD5 (0x1)
; OBJ64-NEXT: ChecksumBytes: (F3 10 AB 26 99 8C A8 31 CB DF 16 9E 4E EC AC FA)
; OBJ64-NEXT: }
; OBJ64-NEXT: ]
; OBJ64: FunctionLineTable [
; OBJ64-NEXT: Name: f
; OBJ64-NEXT: Flags: 0x1
; OBJ64-NEXT: CodeSize: 0xE
; OBJ64-NEXT: FilenameSegment [
; OBJ64-NEXT: Filename: D:\test.c
; OBJ64-NEXT: +0x0 [
; OBJ64-NEXT: LineNumberStart: 3
; OBJ64-NEXT: LineNumberEndDelta: 0
; OBJ64-NEXT: IsStatement: No
; OBJ64-NEXT: ColStart: 0
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ]
; OBJ64-NEXT: +0x4 [
; OBJ64-NEXT: LineNumberStart: 4
; OBJ64-NEXT: LineNumberEndDelta: 0
; OBJ64-NEXT: IsStatement: No
; OBJ64-NEXT: ColStart: 2
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ]
; OBJ64-NEXT: +0x9 [
; OBJ64-NEXT: LineNumberStart: 5
; OBJ64-NEXT: LineNumberEndDelta: 0
; OBJ64-NEXT: IsStatement: No
; OBJ64-NEXT: ColStart: 0
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ]
; OBJ64-NEXT: ]
; OBJ64-NEXT: ]
; Function Attrs: nounwind
define void @f() #0 !dbg !4 {
entry:
call void @g(), !dbg !12
ret void, !dbg !13
}
declare void @g() #1
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!9, !10}
!llvm.ident = !{!11}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "<unknown>", directory: "D:\5C")
!2 = !{}
!4 = distinct !DISubprogram(name: "f", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 3, file: !5, scope: !6, type: !7, retainedNodes: !2)
!5 = !DIFile(filename: "test.c", directory: "D:\5C", checksumkind: CSK_MD5, checksum: "f310ab26998ca831cbdf169e4eecacfa")
!6 = !DIFile(filename: "test.c", directory: "D:C", checksumkind: CSK_MD5, checksum: "f310ab26998ca831cbdf169e4eecacfa")
!7 = !DISubroutineType(types: !8)
!8 = !{null}
!9 = !{i32 2, !"CodeView", i32 1}
!10 = !{i32 1, !"Debug Info Version", i32 3}
!11 = !{!"clang version 3.5 "}
!12 = !DILocation(line: 4, column: 2, scope: !4)
!13 = !DILocation(line: 5, scope: !4)
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