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[CodeView] Initialize column-end to zero

Browse Source 
CodeView, unlike DWARF, can associate code with a range of columns.
However, LLVM can only represent a single column position internally.

We used to claim that the end column and start column were the same
which yielded less than satisfactory results: we would stop printing at
the _beginning_ of the source expression!  Instead, mark the column-end
as 'zero' to indicate that we don't have one (as per the documentation
for IDiaLineNumber::get_lineNumberEnd).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257528 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer 2016-01-12 21:58:20 +00:00
parent 4b49dfacab
commit 469e6b0982
2 changed files with 33 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
View File

@ -283,7 +283,7 @@ void WinCodeViewLineTables::emitDebugInfoForFunction(const Function *GV) {
ColSegI != ColSegEnd; ++ColSegI) {
unsigned ColumnNumber = InstrInfo[FI.Instrs[ColSegI]].ColumnNumber;
Asm->EmitInt16(ColumnNumber); // Start column
Asm->EmitInt16(ColumnNumber); // End column
Asm->EmitInt16(0); // End column
}
Asm->OutStreamer->EmitLabel(FileSegmentEnd);
};

64
test/DebugInfo/COFF/multifunction.ll
View File

@ -90,9 +90,9 @@
; X86-NEXT: .long [[X_RETURN]]-_x
; X86-NEXT: .long 5
; X86-NEXT: .short 42
; X86-NEXT: .short 42
; X86-NEXT: .short 43
; X86-NEXT: .short 0
; X86-NEXT: .short 43
; X86-NEXT: .short 0
; X86-NEXT: [[FILE_SEGMENT_END]]:
; X86-NEXT: [[F2_END]]:
; Symbol subsection for y
@ -133,9 +133,9 @@
; X86-NEXT: .long [[Y_RETURN]]-_y
; X86-NEXT: .long 9
; X86-NEXT: .short 52
; X86-NEXT: .short 52
; X86-NEXT: .short 53
; X86-NEXT: .short 0
; X86-NEXT: .short 53
; X86-NEXT: .short 0
; X86-NEXT: [[FILE_SEGMENT_END]]:
; X86-NEXT: [[F2_END]]:
; Symbol subsection for f
@ -180,13 +180,13 @@
; X86-NEXT: .long [[F_RETURN]]-_f
; X86-NEXT: .long 15
; X86-NEXT: .short 62
; X86-NEXT: .short 62
; X86-NEXT: .short 63
; X86-NEXT: .short 0
; X86-NEXT: .short 63
; X86-NEXT: .short 0
; X86-NEXT: .short 72
; X86-NEXT: .short 72
; X86-NEXT: .short 73
; X86-NEXT: .short 0
; X86-NEXT: .short 73
; X86-NEXT: .short 0
; X86-NEXT: [[FILE_SEGMENT_END]]:
; X86-NEXT: [[F2_END]]:
; File index to string table offset subsection
@ -268,9 +268,9 @@
; OBJ32-NEXT: +0x0: 4
; OBJ32-NEXT: +0x5: 5
; OBJ32-NEXT: ColStart: 42
; OBJ32-NEXT: ColEnd: 42
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ColStart: 43
; OBJ32-NEXT: ColEnd: 43
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ]
; OBJ32-NEXT: ]
; OBJ32-NEXT: FunctionLineTable [
@ -282,9 +282,9 @@
; OBJ32-NEXT: +0x0: 8
; OBJ32-NEXT: +0x5: 9
; OBJ32-NEXT: ColStart: 52
; OBJ32-NEXT: ColEnd: 52
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ColStart: 53
; OBJ32-NEXT: ColEnd: 53
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ]
; OBJ32-NEXT: ]
; OBJ32-NEXT: FunctionLineTable [
@ -298,13 +298,13 @@
; OBJ32-NEXT: +0xA: 14
; OBJ32-NEXT: +0xF: 15
; OBJ32-NEXT: ColStart: 62
; OBJ32-NEXT: ColEnd: 62
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ColStart: 63
; OBJ32-NEXT: ColEnd: 63
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ColStart: 72
; OBJ32-NEXT: ColEnd: 72
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ColStart: 73
; OBJ32-NEXT: ColEnd: 73
; OBJ32-NEXT: ColEnd: 0
; OBJ32-NEXT: ]
; OBJ32-NEXT: ]
@ -392,9 +392,9 @@
; X64-NEXT: .short 0
; X64-NEXT: .short 0
; X64-NEXT: .short 42
; X64-NEXT: .short 42
; X64-NEXT: .short 43
; X64-NEXT: .short 0
; X64-NEXT: .short 43
; X64-NEXT: .short 0
; X64-NEXT: [[FILE_SEGMENT_END]]:
; X64-NEXT: [[F2_END]]:
; Symbol subsection for y
@ -439,9 +439,9 @@
; X64-NEXT: .short 0
; X64-NEXT: .short 0
; X64-NEXT: .short 52
; X64-NEXT: .short 52
; X64-NEXT: .short 53
; X64-NEXT: .short 0
; X64-NEXT: .short 53
; X64-NEXT: .short 0
; X64-NEXT: [[FILE_SEGMENT_END]]:
; X64-NEXT: [[F2_END]]:
; Symbol subsection for f
@ -490,13 +490,13 @@
; X64-NEXT: .short 0
; X64-NEXT: .short 0
; X64-NEXT: .short 62
; X64-NEXT: .short 62
; X64-NEXT: .short 63
; X64-NEXT: .short 0
; X64-NEXT: .short 63
; X64-NEXT: .short 0
; X64-NEXT: .short 72
; X64-NEXT: .short 72
; X64-NEXT: .short 73
; X64-NEXT: .short 0
; X64-NEXT: .short 73
; X64-NEXT: .short 0
; X64-NEXT: [[FILE_SEGMENT_END]]:
; X64-NEXT: [[F2_END]]:
; File index to string table offset subsection
@ -581,9 +581,9 @@
; OBJ64-NEXT: ColStart: 0
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 42
; OBJ64-NEXT: ColEnd: 42
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 43
; OBJ64-NEXT: ColEnd: 43
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ]
; OBJ64-NEXT: ]
; OBJ64-NEXT: FunctionLineTable [
@ -598,9 +598,9 @@
; OBJ64-NEXT: ColStart: 0
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 52
; OBJ64-NEXT: ColEnd: 52
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 53
; OBJ64-NEXT: ColEnd: 53
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ]
; OBJ64-NEXT: ]
; OBJ64-NEXT: FunctionLineTable [
@ -617,13 +617,13 @@
; OBJ64-NEXT: ColStart: 0
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 62
; OBJ64-NEXT: ColEnd: 62
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 63
; OBJ64-NEXT: ColEnd: 63
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 72
; OBJ64-NEXT: ColEnd: 72
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ColStart: 73
; OBJ64-NEXT: ColEnd: 73
; OBJ64-NEXT: ColEnd: 0
; OBJ64-NEXT: ]
; OBJ64-NEXT: ]