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Use DW_FORM_addr for DW_AT_entry_pc.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107085 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-06-28 22:22:47 +00:00
parent 85dfca616a
commit 9b93b6b49a
3 changed files with 51 additions and 1 deletions
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2
lib/CodeGen/AsmPrinter/DIE.cpp
View File

@ -201,6 +201,7 @@ void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const {
case dwarf::DW_FORM_data8: Size = 8; break;
case dwarf::DW_FORM_udata: Asm->EmitULEB128(Integer); return;
case dwarf::DW_FORM_sdata: Asm->EmitSLEB128(Integer); return;
case dwarf::DW_FORM_addr: Size = Asm->getTargetData().getPointerSize(); break;
default: llvm_unreachable("DIE Value form not supported yet");
}
Asm->OutStreamer.EmitIntValue(Integer, Size, 0/*addrspace*/);
@ -221,6 +222,7 @@ unsigned DIEInteger::SizeOf(AsmPrinter *AP, unsigned Form) const {
case dwarf::DW_FORM_data8: return sizeof(int64_t);
case dwarf::DW_FORM_udata: return MCAsmInfo::getULEB128Size(Integer);
case dwarf::DW_FORM_sdata: return MCAsmInfo::getSLEB128Size(Integer);
case dwarf::DW_FORM_addr: return AP->getTargetData().getPointerSize();
default: llvm_unreachable("DIE Value form not supported yet"); break;
}
return 0;

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

@ -1792,7 +1792,7 @@ void DwarfDebug::constructCompileUnit(const MDNode *N) {
addString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
// Use DW_AT_entry_pc instead of DW_AT_low_pc/DW_AT_high_pc pair. This
// simplifies debug range entries.
addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_data4, 0);
addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
// DW_AT_stmt_list is a offset of line number information for this
// compile unit in debug_line section. It is always zero when only one
// compile unit is emitted in one object file.

48
test/FrontendC/2010-06-28-DbgEntryPC.c Normal file
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@ -0,0 +1,48 @@
// RUN: %llvmgcc -S -O2 -g %s -o - | llc -O2 | FileCheck %s
// Use DW_FORM_addr for DW_AT_entry_pc.
// Radar 8094785
// CHECK: .byte 17 ## DW_TAG_compile_unit
// CHECK-NEXT: .byte 1 ## DW_CHILDREN_yes
// CHECK-NEXT: .byte 37 ## DW_AT_producer
// CHECK-NEXT: .byte 8 ## DW_FORM_string
// CHECK-NEXT: .byte 19 ## DW_AT_language
// CHECK-NEXT: .byte 11 ## DW_FORM_data1
// CHECK-NEXT: .byte 3 ## DW_AT_name
// CHECK-NEXT: .byte 8 ## DW_FORM_string
// CHECK-NEXT: .byte 82 ## DW_AT_entry_pc
// CHECK-NEXT: .byte 1 ## DW_FORM_addr
// CHECK-NEXT: .byte 16 ## DW_AT_stmt_list
// CHECK-NEXT: .byte 6 ## DW_FORM_data4
// CHECK-NEXT: .byte 27 ## DW_AT_comp_dir
// CHECK-NEXT: .byte 8 ## DW_FORM_string
// CHECK-NEXT: .byte 225 ## DW_AT_APPLE_optimized
struct a {
int c;
struct a *d;
};
int ret;
void foo(int x) __attribute__((noinline));
void *bar(struct a *b) __attribute__((noinline));
void foo(int x)
{
ret = x;
}
void *bar(struct a *b) {
foo(b->c);
return b;
}
int main(int argc, char *argv[]) {
struct a e;
e.c = 4;
e.d = &e;
(void)bar(&e);
return ret;
}