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Enable code to emit dbg.declare as DEBUG_VALUE

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comments (fast isel, X86).  This doesn't seem
to break any functionality, but will introduce
cases where -g affects the generated code.  I'll
be fixing that.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93811 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2010-01-18 23:34:55 +00:00
parent 6cead7879a
commit 1b346b7f8f
3 changed files with 68 additions and 0 deletions
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3
lib/CodeGen/SelectionDAG/FastISel.cpp
View File

@ -343,6 +343,9 @@ bool FastISel::SelectCall(User *I) {
if (MDNode *Dbg = DI->getMetadata("dbg"))
MMI->setVariableDbgInfo(DI->getVariable(), FI, Dbg);
}
// Building the map above is target independent. Generating DEBUG_VALUE
// inline is target dependent; do this now.
(void)TargetSelectInstruction(cast<Instruction>(I));
return true;
}
case Intrinsic::eh_exception: {

10
lib/Target/X86/X86FastISel.cpp
View File

@ -1153,6 +1153,16 @@ bool X86FastISel::X86VisitIntrinsicCall(IntrinsicInst &I) {
// FIXME: Handle more intrinsics.
switch (I.getIntrinsicID()) {
default: return false;
case Intrinsic::dbg_declare: {
DbgDeclareInst *DI = cast<DbgDeclareInst>(&I);
X86AddressMode AM;
if (!X86SelectAddress(DI->getAddress(), AM))
return false;
const TargetInstrDesc &II = TII.get(TargetInstrInfo::DEBUG_VALUE);
addFullAddress(BuildMI(MBB, DL, II), AM).addImm(0).
addMetadata(DI->getVariable());
return true;
}
case Intrinsic::trap: {
BuildMI(MBB, DL, TII.get(X86::TRAP));
return true;

55
test/DebugInfo/2010-01-18-DbgValue.ll Normal file
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@ -0,0 +1,55 @@
; RUN: llc -O0 < %s | FileCheck %s
; ModuleID = 'try.c'
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
target triple = "i386-apple-darwin9.8"
; Currently, dbg.declare generates a DEBUG_VALUE comment. Eventually it will
; generate DWARF and this test will need to be modified or removed.
@Y = common global i32 0 ; <i32*> [#uses=1]
define i32 @test() nounwind {
entry:
; CHECK: DEBUG_VALUE:
%retval = alloca i32 ; <i32*> [#uses=2]
%X = alloca i32 ; <i32*> [#uses=5]
%0 = alloca i32 ; <i32*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
call void @llvm.dbg.declare(metadata !{i32* %X}, metadata !3), !dbg !7
store i32 4, i32* %X, align 4, !dbg !8
%1 = load i32* %X, align 4, !dbg !9 ; <i32> [#uses=1]
call void @use(i32 %1) nounwind, !dbg !9
%2 = load i32* @Y, align 4, !dbg !10 ; <i32> [#uses=1]
%3 = add nsw i32 %2, 2, !dbg !10 ; <i32> [#uses=1]
store i32 %3, i32* %X, align 4, !dbg !10
%4 = load i32* %X, align 4, !dbg !11 ; <i32> [#uses=1]
call void @use(i32 %4) nounwind, !dbg !11
%5 = load i32* %X, align 4, !dbg !12 ; <i32> [#uses=1]
store i32 %5, i32* %0, align 4, !dbg !12
%6 = load i32* %0, align 4, !dbg !12 ; <i32> [#uses=1]
store i32 %6, i32* %retval, align 4, !dbg !12
br label %return, !dbg !12
return: ; preds = %entry
%retval1 = load i32* %retval, !dbg !12 ; <i32> [#uses=1]
ret i32 %retval1, !dbg !12
}
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
declare void @use(i32)
!llvm.dbg.gv = !{!0}
!0 = metadata !{i32 458804, i32 0, metadata !1, metadata !"Y", metadata !"Y", metadata !"Y", metadata !1, i32 2, metadata !2, i1 false, i1 true, i32* @Y} ; [ DW_TAG_variable ]
!1 = metadata !{i32 458769, i32 0, i32 1, metadata !"try.c", metadata !"/Volumes/MacOS9/tests/", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!2 = metadata !{i32 458788, metadata !1, metadata !"int", metadata !1, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
!3 = metadata !{i32 459008, metadata !4, metadata !"X", metadata !1, i32 4, metadata !2} ; [ DW_TAG_auto_variable ]
!4 = metadata !{i32 458798, i32 0, metadata !1, metadata !"", metadata !"", metadata !"test", metadata !1, i32 3, metadata !5, i1 false, i1 true, i32 0, i32 0, null} ; [ DW_TAG_subprogram ]
!5 = metadata !{i32 458773, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !6, i32 0} ; [ DW_TAG_subroutine_type ]
!6 = metadata !{metadata !2}
!7 = metadata !{i32 3, i32 0, metadata !4, null}
!8 = metadata !{i32 4, i32 0, metadata !4, null}
!9 = metadata !{i32 5, i32 0, metadata !4, null}
!10 = metadata !{i32 6, i32 0, metadata !4, null}
!11 = metadata !{i32 7, i32 0, metadata !4, null}
!12 = metadata !{i32 8, i32 0, metadata !4, null}