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Emit debug info for byval parameters.

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llvm-svn: 102486
This commit is contained in:
Devang Patel 2010-04-28 01:39:28 +00:00
parent b7bb090d5d
commit 570e9d53a7
6 changed files with 79 additions and 5 deletions
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7
include/llvm/CodeGen/AsmPrinter.h
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@ -34,6 +34,7 @@ namespace llvm {
class MachineBasicBlock;
class MachineFunction;
class MachineInstr;
class MachineLocation;
class MachineLoopInfo;
class MachineLoop;
class MachineConstantPool;
@ -368,7 +369,11 @@ namespace llvm {
/// that Label lives in.
void EmitSectionOffset(const MCSymbol *Label,
const MCSymbol *SectionLabel) const;
/// getDebugValueLocation - Get location information encoded by DBG_VALUE
/// operands.
virtual MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
//===------------------------------------------------------------------===//
// Dwarf Lowering Routines
//===------------------------------------------------------------------===//

6
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -641,6 +641,12 @@ void AsmPrinter::EmitFunctionBody() {
OutStreamer.AddBlankLine();
}
/// getDebugValueLocation - Get location information encoded by DBG_VALUE
/// operands.
MachineLocation AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
// Target specific DBG_VALUE instructions are handled by each target.
return MachineLocation();
}
bool AsmPrinter::doFinalization(Module &M) {
// Emit global variables.

13
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1602,6 +1602,15 @@ DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
updated = addConstantValue(VariableDie, DV, DVInsn->getOperand(0));
else if (DVInsn->getOperand(0).isFPImm())
updated = addConstantFPValue(VariableDie, DV, DVInsn->getOperand(0));
} else {
MachineLocation Location = Asm->getDebugValueLocation(DVInsn);
if (Location.getReg()) {
addAddress(VariableDie, dwarf::DW_AT_location, Location);
if (MCSymbol *VS = DV->getDbgValueLabel())
addLabel(VariableDie, dwarf::DW_AT_start_scope, dwarf::DW_FORM_addr,
VS);
updated = true;
}
}
if (!updated) {
// If variableDie is not updated then DBG_VALUE instruction does not
@ -2102,10 +2111,6 @@ void DwarfDebug::collectVariableInfo() {
if (!MInsn->isDebugValue())
continue;
// FIXME : Lift this restriction.
if (MInsn->getNumOperands() != 3)
continue;
// Ignore Undef values.
if (MInsn->getOperand(0).isReg() && !MInsn->getOperand(0).getReg())
continue;

2
lib/Target/X86/AsmPrinter/X86AsmPrinter.h
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@ -80,6 +80,8 @@ class VISIBILITY_HIDDEN X86AsmPrinter : public AsmPrinter {
bool runOnMachineFunction(MachineFunction &F);
void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
};
} // end namespace llvm

11
lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
View File

@ -355,6 +355,17 @@ void X86AsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
printOperand(MI, NOps-2, O);
}
MachineLocation
X86AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
MachineLocation Location;
assert (MI->getNumOperands() == 7 && "Invalid no. of machine operands!");
// Frame address. Currently handles register +- offset only.
assert(MI->getOperand(0).isReg() && MI->getOperand(3).isImm());
Location.set(MI->getOperand(0).getReg(), MI->getOperand(3).getImm());
return Location;
}
void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
X86MCInstLower MCInstLowering(OutContext, Mang, *this);
switch (MI->getOpcode()) {

45
test/CodeGen/X86/dbg-byval-parameter.ll Normal file
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@ -0,0 +1,45 @@
; RUN: llc -march=x86 -asm-verbose < %s | grep DW_TAG_formal_parameter
%struct.Pt = type { double, double }
%struct.Rect = type { %struct.Pt, %struct.Pt }
define double @foo(%struct.Rect* byval %my_r0) nounwind ssp {
entry:
%retval = alloca double ; <double*> [#uses=2]
%0 = alloca double ; <double*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
call void @llvm.dbg.declare(metadata !{%struct.Rect* %my_r0}, metadata !0), !dbg !15
%1 = getelementptr inbounds %struct.Rect* %my_r0, i32 0, i32 0, !dbg !16 ; <%struct.Pt*> [#uses=1]
%2 = getelementptr inbounds %struct.Pt* %1, i32 0, i32 0, !dbg !16 ; <double*> [#uses=1]
%3 = load double* %2, align 8, !dbg !16 ; <double> [#uses=1]
store double %3, double* %0, align 8, !dbg !16
%4 = load double* %0, align 8, !dbg !16 ; <double> [#uses=1]
store double %4, double* %retval, align 8, !dbg !16
br label %return, !dbg !16
return: ; preds = %entry
%retval1 = load double* %retval, !dbg !16 ; <double> [#uses=1]
ret double %retval1, !dbg !16
}
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
!0 = metadata !{i32 524545, metadata !1, metadata !"my_r0", metadata !2, i32 11, metadata !7} ; [ DW_TAG_arg_variable ]
!1 = metadata !{i32 524334, i32 0, metadata !2, metadata !"foo", metadata !"foo", metadata !"foo", metadata !2, i32 11, metadata !4, i1 false, i1 true, i32 0, i32 0, null, i1 false} ; [ DW_TAG_subprogram ]
!2 = metadata !{i32 524329, metadata !"b2.c", metadata !"/tmp/", metadata !3} ; [ DW_TAG_file_type ]
!3 = metadata !{i32 524305, i32 0, i32 1, metadata !"b2.c", metadata !"/tmp/", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!4 = metadata !{i32 524309, metadata !2, metadata !"", metadata !2, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !5, i32 0, null} ; [ DW_TAG_subroutine_type ]
!5 = metadata !{metadata !6, metadata !7}
!6 = metadata !{i32 524324, metadata !2, metadata !"double", metadata !2, i32 0, i64 64, i64 64, i64 0, i32 0, i32 4} ; [ DW_TAG_base_type ]
!7 = metadata !{i32 524307, metadata !2, metadata !"Rect", metadata !2, i32 6, i64 256, i64 64, i64 0, i32 0, null, metadata !8, i32 0, null} ; [ DW_TAG_structure_type ]
!8 = metadata !{metadata !9, metadata !14}
!9 = metadata !{i32 524301, metadata !7, metadata !"P1", metadata !2, i32 7, i64 128, i64 64, i64 0, i32 0, metadata !10} ; [ DW_TAG_member ]
!10 = metadata !{i32 524307, metadata !2, metadata !"Pt", metadata !2, i32 1, i64 128, i64 64, i64 0, i32 0, null, metadata !11, i32 0, null} ; [ DW_TAG_structure_type ]
!11 = metadata !{metadata !12, metadata !13}
!12 = metadata !{i32 524301, metadata !10, metadata !"x", metadata !2, i32 2, i64 64, i64 64, i64 0, i32 0, metadata !6} ; [ DW_TAG_member ]
!13 = metadata !{i32 524301, metadata !10, metadata !"y", metadata !2, i32 3, i64 64, i64 64, i64 64, i32 0, metadata !6} ; [ DW_TAG_member ]
!14 = metadata !{i32 524301, metadata !7, metadata !"P2", metadata !2, i32 8, i64 128, i64 64, i64 128, i32 0, metadata !10} ; [ DW_TAG_member ]
!15 = metadata !{i32 11, i32 0, metadata !1, null}
!16 = metadata !{i32 12, i32 0, metadata !17, null}
!17 = metadata !{i32 524299, metadata !1, i32 11, i32 0} ; [ DW_TAG_lexical_block ]