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[Debug-Info] handle DW_CC_pass_by_value/DW_CC_pass_by_reference under strict DWARF.

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Summary: When -strict-dwarf=true is specified, the calling convention info
    DW_CC_pass_by_value or DW_CC_pass_by_reference can only be generated at DWARF5.

Reviewed By: shchenz, dblaikie

Differential Revision: https://reviews.llvm.org/D103300
This commit is contained in:
Esme-Yi 2021-06-04 08:14:47 +00:00
parent 0768752613
commit 914b5eeb20
2 changed files with 19 additions and 8 deletions
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19
lib/CodeGen/AsmPrinter/DwarfUnit.cpp
View File

@ -939,14 +939,17 @@ void DwarfUnit::constructTypeDIE(DIE &Buffer, const DICompositeType *CTy) {
addFlag(Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
// Add the type's non-standard calling convention.
uint8_t CC = 0;
if (CTy->isTypePassByValue())
CC = dwarf::DW_CC_pass_by_value;
else if (CTy->isTypePassByReference())
CC = dwarf::DW_CC_pass_by_reference;
if (CC)
addUInt(Buffer, dwarf::DW_AT_calling_convention, dwarf::DW_FORM_data1,
CC);
// DW_CC_pass_by_value/DW_CC_pass_by_reference are introduced in DWARF 5.
if (!Asm->TM.Options.DebugStrictDwarf || DD->getDwarfVersion() >= 5) {
uint8_t CC = 0;
if (CTy->isTypePassByValue())
CC = dwarf::DW_CC_pass_by_value;
else if (CTy->isTypePassByReference())
CC = dwarf::DW_CC_pass_by_reference;
if (CC)
addUInt(Buffer, dwarf::DW_AT_calling_convention, dwarf::DW_FORM_data1,
CC);
}
break;
}
default:

8
test/DebugInfo/Generic/pass-by-value.ll
View File

@ -1,4 +1,6 @@
; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-info - | FileCheck %s
; RUN: %llc_dwarf -O0 -filetype=obj < %s -strict-dwarf=true | llvm-dwarfdump -debug-info - \
; RUN: | FileCheck %s --check-prefix=STRICT --implicit-check-not DW_AT_calling_convention
;
; // S is not trivially copyable.
; struct S {
@ -20,6 +22,12 @@
; CHECK: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_calling_convention (DW_CC_pass_by_value)
; CHECK-NEXT: DW_AT_name ("T")
;
; STRICT: DW_TAG_structure_type
; STRICT-NEXT: DW_AT_name ("S")
;
; STRICT: DW_TAG_structure_type
; STRICT-NEXT: DW_AT_name ("T")
%struct.S = type { i8 }
%struct.T = type { i8 }