From 26c6cf4cecfffcb908cc6afe01d25fab5c88df43 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Thu, 8 Oct 2009 20:52:51 +0000 Subject: It's possible for a global variable to be optimized out of a metadata object. So we should allow a "null" with this dyn_cast. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83573 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../2009-10-08-DebugInfo-NullGlobalVariable.ll | 72 ++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 test/DebugInfo/2009-10-08-DebugInfo-NullGlobalVariable.ll (limited to 'test/DebugInfo') diff --git a/test/DebugInfo/2009-10-08-DebugInfo-NullGlobalVariable.ll b/test/DebugInfo/2009-10-08-DebugInfo-NullGlobalVariable.ll new file mode 100644 index 0000000000..fc28107866 --- /dev/null +++ b/test/DebugInfo/2009-10-08-DebugInfo-NullGlobalVariable.ll @@ -0,0 +1,72 @@ +; RUN: llc < %s + +%struct.TConstantDictionary = type { %struct.__CFDictionary* } +%struct.TSharedGlobalSet_AS = type { [52 x i32], [20 x i32], [22 x i32], [8 x i32], [20 x i32], [146 x i32] } +%struct.__CFDictionary = type opaque + +@llvm.used = appending global [1 x i8*] [i8* bitcast (void ()* @func to i8*)], section "llvm.metadata" ; <[1 x i8*]*> [#uses=0] + +define void @func() ssp { +entry: + tail call void @llvm.dbg.func.start(metadata !13) + tail call void @llvm.dbg.stoppoint(i32 1001, i32 0, metadata !1) + %0 = tail call %struct.TSharedGlobalSet_AS* @g1() nounwind ; <%struct.TSharedGlobalSet_AS*> [#uses=1] + %1 = getelementptr inbounds %struct.TSharedGlobalSet_AS* %0, i32 0, i32 4, i32 4 ; [#uses=1] + %2 = bitcast i32* %1 to %struct.TConstantDictionary* ; <%struct.TConstantDictionary*> [#uses=1] + tail call void @g2(%struct.TConstantDictionary* %2) ssp + tail call void @llvm.dbg.stoppoint(i32 1002, i32 0, metadata !1) + %3 = tail call %struct.TSharedGlobalSet_AS* @g1() nounwind ; <%struct.TSharedGlobalSet_AS*> [#uses=1] + %4 = getelementptr inbounds %struct.TSharedGlobalSet_AS* %3, i32 0, i32 4, i32 3 ; [#uses=1] + %5 = bitcast i32* %4 to %struct.TConstantDictionary* ; <%struct.TConstantDictionary*> [#uses=1] + tail call void @g4(%struct.TConstantDictionary* %5) ssp + tail call void @llvm.dbg.stoppoint(i32 1003, i32 0, metadata !1) + %6 = tail call %struct.TSharedGlobalSet_AS* @g1() nounwind ; <%struct.TSharedGlobalSet_AS*> [#uses=1] + %7 = getelementptr inbounds %struct.TSharedGlobalSet_AS* %6, i32 0, i32 4, i32 2 ; [#uses=1] + %8 = bitcast i32* %7 to %struct.TConstantDictionary* ; <%struct.TConstantDictionary*> [#uses=1] + tail call void @g3(%struct.TConstantDictionary* %8) ssp + tail call void @llvm.dbg.stoppoint(i32 1004, i32 0, metadata !1) + %9 = tail call %struct.TSharedGlobalSet_AS* @g1() nounwind ; <%struct.TSharedGlobalSet_AS*> [#uses=1] + %10 = getelementptr inbounds %struct.TSharedGlobalSet_AS* %9, i32 0, i32 4, i32 1 ; [#uses=1] + %11 = bitcast i32* %10 to %struct.TConstantDictionary* ; <%struct.TConstantDictionary*> [#uses=1] + tail call void @g4(%struct.TConstantDictionary* %11) ssp + tail call void @llvm.dbg.stoppoint(i32 1005, i32 0, metadata !1) + tail call void @g5() + tail call void @llvm.dbg.stoppoint(i32 1006, i32 0, metadata !1) + tail call void @llvm.dbg.region.end(metadata !13) + ret void +} + +declare void @llvm.dbg.func.start(metadata) nounwind readnone + +declare void @llvm.dbg.stoppoint(i32, i32, metadata) nounwind readnone + +declare void @llvm.dbg.region.end(metadata) nounwind readnone + +declare %struct.TSharedGlobalSet_AS* @g1() nounwind readonly ssp + +declare void @g2(%struct.TConstantDictionary* nocapture) ssp align 2 + +declare void @g3(%struct.TConstantDictionary* nocapture) ssp align 2 + +declare void @g4(%struct.TConstantDictionary* nocapture) ssp align 2 + +declare void @g5() + +!llvm.dbg.gv = !{!0, !9, !10, !11, !12} + +!0 = metadata !{i32 458804, i32 0, metadata !1, metadata !"_ZZ7UASInitmmmmmmmmmE5C.408", metadata !"C.408", metadata !"_ZZ7UASInitmmmmmmmmmE5C.408", metadata !1, i32 874, metadata !2, i1 false, i1 true, null}; [DW_TAG_variable ] +!1 = metadata !{i32 458769, i32 0, i32 4, metadata !"func.cp", metadata !"/tmp/func", metadata !"4.2.1 (Based on Apple Inc. build 5653) (LLVM build 2311)", i1 false, i1 false, metadata !"", i32 0}; [DW_TAG_compile_unit ] +!2 = metadata !{i32 458753, metadata !3, metadata !"", metadata !3, i32 0, i64 16, i64 16, i64 0, i32 0, metadata !4, metadata !7, i32 0}; [DW_TAG_array_type ] +!3 = metadata !{i32 458769, i32 0, i32 4, metadata !"testcase.ii", metadata !"/tmp/", metadata !"4.2.1 (Based on Apple Inc. build 5653) (LLVM build 2311)", i1 true, i1 false, metadata !"", i32 0}; [DW_TAG_compile_unit ] +!4 = metadata !{i32 458774, metadata !3, metadata !"UniChar", metadata !5, i32 417, i64 0, i64 0, i64 0, i32 0, metadata !6}; [DW_TAG_typedef ] +!5 = metadata !{i32 458769, i32 0, i32 4, metadata !"MacTypes.h", metadata !"/System/Library/Frameworks/CoreServices.framework/Headers/../Frameworks/CarbonCore.framework/Headers", metadata !"4.2.1 (Based on Apple Inc. build 5653) (LLVM build 2311)", i1 false, i1 true, metadata !"", i32 0}; [DW_TAG_compile_unit ] +!6 = metadata !{i32 458788, metadata !3, metadata !"short unsigned int", metadata !3, i32 0, i64 16, i64 16, i64 0, i32 0, i32 7}; [DW_TAG_base_type ] +!7 = metadata !{metadata !8} +!8 = metadata !{i32 458785, i64 0, i64 0}; [DW_TAG_subrange_type ] +!9 = metadata !{i32 458804, i32 0, metadata !1, metadata !"_ZZ7UASInitmmmmmmmmmE5C.409", metadata !"C.409", metadata !"_ZZ7UASInitmmmmmmmmmE5C.409", metadata !1, i32 877, metadata !2, i1 false, i1 true, null}; [DW_TAG_variable ] +!10 = metadata !{i32 458804, i32 0, metadata !1, metadata !"_ZZ7UASInitmmmmmmmmmE5C.410", metadata !"C.410", metadata !"_ZZ7UASInitmmmmmmmmmE5C.410", metadata !1, i32 880, metadata !2, i1 false, i1 true, null}; [DW_TAG_variable ] +!11 = metadata !{i32 458804, i32 0, metadata !1, metadata !"_ZZ7UASInitmmmmmmmmmE5C.411", metadata !"C.411", metadata !"_ZZ7UASInitmmmmmmmmmE5C.411", metadata !1, i32 924, metadata !2, i1 false, i1 true, null}; [DW_TAG_variable ] +!12 = metadata !{i32 458804, i32 0, metadata !1, metadata !"_ZZ7UASInitmmmmmmmmmE5C.412", metadata !"C.412", metadata !"_ZZ7UASInitmmmmmmmmmE5C.412", metadata !1, i32 928, metadata !2, i1 false, i1 true, null}; [DW_TAG_variable ] +!13 = metadata !{i32 458798, i32 0, metadata !3, metadata !"UASShutdown", metadata !"UASShutdown", metadata !"_Z11UASShutdownv", metadata !1, i32 999, metadata !14, i1 false, i1 true}; [DW_TAG_subprogram ] +!14 = metadata !{i32 458773, metadata !3, metadata !"", metadata !3, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !15, i32 0}; [DW_TAG_subroutine_type ] +!15 = metadata !{null} -- cgit v1.2.3