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Enable code to emit dbg.declare as DEBUG_VALUE
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
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@ -343,6 +343,9 @@ bool FastISel::SelectCall(User *I) {
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if (MDNode *Dbg = DI->getMetadata("dbg"))
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MMI->setVariableDbgInfo(DI->getVariable(), FI, Dbg);
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}
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// Building the map above is target independent. Generating DEBUG_VALUE
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// inline is target dependent; do this now.
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(void)TargetSelectInstruction(cast<Instruction>(I));
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return true;
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}
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case Intrinsic::eh_exception: {
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@ -1153,6 +1153,16 @@ bool X86FastISel::X86VisitIntrinsicCall(IntrinsicInst &I) {
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// FIXME: Handle more intrinsics.
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switch (I.getIntrinsicID()) {
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default: return false;
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case Intrinsic::dbg_declare: {
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DbgDeclareInst *DI = cast<DbgDeclareInst>(&I);
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X86AddressMode AM;
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if (!X86SelectAddress(DI->getAddress(), AM))
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return false;
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const TargetInstrDesc &II = TII.get(TargetInstrInfo::DEBUG_VALUE);
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addFullAddress(BuildMI(MBB, DL, II), AM).addImm(0).
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addMetadata(DI->getVariable());
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return true;
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}
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case Intrinsic::trap: {
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BuildMI(MBB, DL, TII.get(X86::TRAP));
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return true;
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55
test/DebugInfo/2010-01-18-DbgValue.ll
Normal file
55
test/DebugInfo/2010-01-18-DbgValue.ll
Normal file
@ -0,0 +1,55 @@
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; RUN: llc -O0 < %s | FileCheck %s
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; ModuleID = 'try.c'
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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"
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target triple = "i386-apple-darwin9.8"
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; Currently, dbg.declare generates a DEBUG_VALUE comment. Eventually it will
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; generate DWARF and this test will need to be modified or removed.
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@Y = common global i32 0 ; <i32*> [#uses=1]
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define i32 @test() nounwind {
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entry:
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; CHECK: DEBUG_VALUE:
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%retval = alloca i32 ; <i32*> [#uses=2]
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%X = alloca i32 ; <i32*> [#uses=5]
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%0 = alloca i32 ; <i32*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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call void @llvm.dbg.declare(metadata !{i32* %X}, metadata !3), !dbg !7
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store i32 4, i32* %X, align 4, !dbg !8
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%1 = load i32* %X, align 4, !dbg !9 ; <i32> [#uses=1]
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call void @use(i32 %1) nounwind, !dbg !9
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%2 = load i32* @Y, align 4, !dbg !10 ; <i32> [#uses=1]
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%3 = add nsw i32 %2, 2, !dbg !10 ; <i32> [#uses=1]
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store i32 %3, i32* %X, align 4, !dbg !10
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%4 = load i32* %X, align 4, !dbg !11 ; <i32> [#uses=1]
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call void @use(i32 %4) nounwind, !dbg !11
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%5 = load i32* %X, align 4, !dbg !12 ; <i32> [#uses=1]
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store i32 %5, i32* %0, align 4, !dbg !12
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%6 = load i32* %0, align 4, !dbg !12 ; <i32> [#uses=1]
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store i32 %6, i32* %retval, align 4, !dbg !12
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br label %return, !dbg !12
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return: ; preds = %entry
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%retval1 = load i32* %retval, !dbg !12 ; <i32> [#uses=1]
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ret i32 %retval1, !dbg !12
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}
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declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
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declare void @use(i32)
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!llvm.dbg.gv = !{!0}
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!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 ]
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!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 ]
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!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 ]
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!3 = metadata !{i32 459008, metadata !4, metadata !"X", metadata !1, i32 4, metadata !2} ; [ DW_TAG_auto_variable ]
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!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 ]
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!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 ]
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!6 = metadata !{metadata !2}
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!7 = metadata !{i32 3, i32 0, metadata !4, null}
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!8 = metadata !{i32 4, i32 0, metadata !4, null}
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!9 = metadata !{i32 5, i32 0, metadata !4, null}
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!10 = metadata !{i32 6, i32 0, metadata !4, null}
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!11 = metadata !{i32 7, i32 0, metadata !4, null}
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!12 = metadata !{i32 8, i32 0, metadata !4, null}
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