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Turn on CU ranges if we've got multiple compile units in the same

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module since there's no range guarantee that we could make given
output order. This also fixes up the testcases that have multiple
CUs to have the correct range offset.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200422 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2014-01-29 22:06:27 +00:00
parent 4ec1a52c5f
commit c879504978
2 changed files with 11 additions and 9 deletions
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10
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1119,10 +1119,12 @@ void DwarfDebug::endSections() {
}
// For now only turn on CU ranges if we've explicitly asked for it,
// we have -ffunction-sections enabled, or we've emitted a function
// into a unique section. At this point all sections should be finalized
// except for dwarf sections.
HasCURanges = DwarfCURanges || UsedNonDefaultText ||
// we have -ffunction-sections enabled, we've emitted a function
// into a unique section, or we're using LTO. If we're using LTO then
// we can't know that any particular function in the module is correlated
// to a particular CU and so we need to be conservative. At this point all
// sections should be finalized except for dwarf sections.
HasCURanges = DwarfCURanges || UsedNonDefaultText || (CUMap.size() > 1) ||
TargetMachine::getFunctionSections();
}

10
test/DebugInfo/X86/stmt-list-multiple-compile-units.ll
View File

@ -8,11 +8,11 @@
; CHECK: .debug_info contents:
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
; CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x00000000)
; CHECK: DW_TAG_compile_unit
; CHECK: DW_AT_stmt_list [DW_FORM_sec_offset] (0x0000003c)
; CHECK: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
; CHECK: DW_AT_ranges [DW_FORM_sec_offset] (0x00000020)
; CHECK: .debug_line contents:
; CHECK-NEXT: Line table prologue:
@ -25,12 +25,12 @@
; DWARF3: .debug_info contents:
; DWARF3: DW_TAG_compile_unit
; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
; DWARF3: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x00000000)
; DWARF3: DW_AT_ranges [DW_FORM_data4] (0x00000000)
; DWARF3: DW_TAG_compile_unit
; DWARF3: DW_AT_stmt_list [DW_FORM_data4] (0x0000003c)
; DWARF3: DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
; DWARF3: DW_AT_ranges [DW_FORM_data4] (0x00000020)
; DWARF3: .debug_line contents:
; DWARF3-NEXT: Line table prologue: