DebugInfo: Simplify/correct test for correct constant emission when dealing with derived types.

This test was using the inliner and other optimizations to test a case
that's actually a bug anyway. Bug and possible fix/discussion described
here ( http://reviews.llvm.org/D3714 ).

But the functionality that was implemented along with this test is still
desired, so simplify the test to verify a more obvious/less wrong case
that the functionality addressed: looking through const sugar to the
underlying type when emitting a constant (so the constant is emitted as
signed/unsigned as appropriate depending on the signedness of the
underlying type).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208504 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 69 insertions, 66 deletions

diff --git a/test/DebugInfo/X86/dbg-large-unsigned-const.ll b/test/DebugInfo/X86/dbg-large-unsigned-const.ll
deleted file mode 100644
index 3caa49d17d..0000000000
--- a/test/DebugInfo/X86/dbg-large-unsigned-const.ll
+++ /dev/null
@@ -1,66 +0,0 @@
-; Handle large unsigned constant values.
-; RUN: llc -filetype=obj %s -o %t.o
-; RUN: llvm-dwarfdump %t.o | FileCheck %s
-; CHECK: DW_TAG_inlined_subroutine
-; CHECK: DW_AT_const_value [DW_FORM_sdata]	(9223372036854775807)
-;
-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-macosx10.7.0"
-
-define zeroext i1 @_Z3iseRKxS0_(i64* nocapture %LHS, i64* nocapture %RHS) nounwind readonly optsize ssp {
-entry:
-  tail call void @llvm.dbg.value(metadata !{i64* %LHS}, i64 0, metadata !7), !dbg !13
-  tail call void @llvm.dbg.value(metadata !{i64* %RHS}, i64 0, metadata !11), !dbg !14
-  %tmp1 = load i64* %LHS, align 4, !dbg !15
-  %tmp3 = load i64* %RHS, align 4, !dbg !15
-  %cmp = icmp eq i64 %tmp1, %tmp3, !dbg !15
-  ret i1 %cmp, !dbg !15
-}
-
-define zeroext i1 @_Z2fnx(i64 %a) nounwind readnone optsize ssp {
-entry:
-  tail call void @llvm.dbg.value(metadata !{i64 %a}, i64 0, metadata !12), !dbg !20
-  tail call void @llvm.dbg.value(metadata !{i64 %a}, i64 0, metadata !12), !dbg !20
-  tail call void @llvm.dbg.value(metadata !{i64 %a}, i64 0, metadata !21), !dbg !24
-  tail call void @llvm.dbg.value(metadata !25, i64 0, metadata !26), !dbg !27
-  %cmp.i = icmp eq i64 %a, 9223372036854775807, !dbg !28
-  ret i1 %cmp.i, !dbg !22
-}
-
-declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
-
-!llvm.dbg.cu = !{!0}
-!llvm.module.flags = !{!34}
-!29 = metadata !{metadata !1, metadata !6}
-!30 = metadata !{metadata !7, metadata !11}
-!31 = metadata !{metadata !12}
-
-!0 = metadata !{i32 786449, metadata !32, i32 4, metadata !"clang version 3.0 (trunk 135593)", i1 true, metadata !"", i32 0, metadata !33, metadata !33, metadata !29, null, null, metadata !""} ; [ DW_TAG_compile_unit ]
-!1 = metadata !{i32 786478, metadata !32, null, metadata !"ise", metadata !"ise", metadata !"_Z3iseRKxS0_", i32 2, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i1 (i64*, i64*)* @_Z3iseRKxS0_, null, null, metadata !30, i32 2} ; [ DW_TAG_subprogram ]
-!2 = metadata !{i32 786473, metadata !32} ; [ DW_TAG_file_type ]
-!3 = metadata !{i32 786453, metadata !32, metadata !2, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
-!4 = metadata !{metadata !5}
-!5 = metadata !{i32 786468, null, metadata !0, metadata !"bool", i32 0, i64 8, i64 8, i64 0, i32 0, i32 2} ; [ DW_TAG_base_type ]
-!6 = metadata !{i32 786478, metadata !32, null, metadata !"fn", metadata !"fn", metadata !"_Z2fnx", i32 6, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i1 (i64)* @_Z2fnx, null, null, metadata !31, i32 6} ; [ DW_TAG_subprogram ] [line 6] [def] [fn]
-!7 = metadata !{i32 786689, metadata !1, metadata !"LHS", metadata !2, i32 16777218, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
-!8 = metadata !{i32 786448, metadata !0, null, null, i32 0, i64 32, i64 32, i64 0, i32 0, metadata !9} ; [ DW_TAG_reference_type ]
-!9 = metadata !{i32 786470, metadata !0, null, null, i32 0, i64 0, i64 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_const_type ]
-!10 = metadata !{i32 786468, null, metadata !0, metadata !"long long int", i32 0, i64 64, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
-!11 = metadata !{i32 786689, metadata !1, metadata !"RHS", metadata !2, i32 33554434, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
-!12 = metadata !{i32 786689, metadata !6, metadata !"a", metadata !2, i32 16777222, metadata !10, i32 0, i32 0} ; [ DW_TAG_arg_variable ]
-!13 = metadata !{i32 2, i32 27, metadata !1, null}
-!14 = metadata !{i32 2, i32 49, metadata !1, null}
-!15 = metadata !{i32 3, i32 3, metadata !16, null}
-!16 = metadata !{i32 786443, metadata !32, metadata !1, i32 2, i32 54, i32 0} ; [ DW_TAG_lexical_block ]
-!20 = metadata !{i32 6, i32 19, metadata !6, null}
-!21 = metadata !{i32 786689, metadata !1, metadata !"LHS", metadata !2, i32 16777218, metadata !8, i32 0, metadata !22} ; [ DW_TAG_arg_variable ]
-!22 = metadata !{i32 7, i32 10, metadata !23, null}
-!23 = metadata !{i32 786443, metadata !32, metadata !6, i32 6, i32 22, i32 1} ; [ DW_TAG_lexical_block ]
-!24 = metadata !{i32 2, i32 27, metadata !1, metadata !22}
-!25 = metadata !{i64 9223372036854775807}         
-!26 = metadata !{i32 786689, metadata !1, metadata !"RHS", metadata !2, i32 33554434, metadata !8, i32 0, metadata !22} ; [ DW_TAG_arg_variable ]
-!27 = metadata !{i32 2, i32 49, metadata !1, metadata !22}
-!28 = metadata !{i32 3, i32 3, metadata !16, metadata !22}
-!32 = metadata !{metadata !"lli.cc", metadata !"/private/tmp"}
-!33 = metadata !{i32 0}
-!34 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
diff --git a/test/DebugInfo/sugared-constants.ll b/test/DebugInfo/sugared-constants.ll
new file mode 100644
index 0000000000..c44f3ba2e9
--- /dev/null
+++ b/test/DebugInfo/sugared-constants.ll
@@ -0,0 +1,69 @@
+; REQUIRES: object-emission
+
+; RUN: %llc_dwarf -O0 -filetype=obj %s -o - | llvm-dwarfdump -debug-dump=info - | FileCheck %s
+; Use correct signedness when emitting constants of derived (sugared) types.
+
+
+; void func(int);
+; void func(unsigned);
+; int main() {
+;   const int i = 42;
+;   func(i);
+;   const unsigned j = 117;
+;   func(j);
+; }
+
+; CHECK: DW_AT_const_value [DW_FORM_sdata] (42)
+; CHECK: DW_AT_const_value [DW_FORM_udata] (117)
+
+; Function Attrs: uwtable
+define i32 @main() #0 {
+entry:
+  tail call void @llvm.dbg.value(metadata !18, i64 0, metadata !10), !dbg !19
+  tail call void @_Z4funci(i32 42), !dbg !20
+  tail call void @llvm.dbg.value(metadata !21, i64 0, metadata !12), !dbg !22
+  tail call void @_Z4funcj(i32 117), !dbg !23
+  ret i32 0, !dbg !24
+}
+
+declare void @_Z4funci(i32) #1
+
+declare void @_Z4funcj(i32) #1
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata) #2
+
+attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!15, !16}
+!llvm.ident = !{!17}
+
+!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 ", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/const.cpp] [DW_LANG_C_plus_plus]
+!1 = metadata !{metadata !"const.cpp", metadata !"/tmp/dbginfo"}
+!2 = metadata !{}
+!3 = metadata !{metadata !4}
+!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"main", metadata !"main", metadata !"", i32 3, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, i32 ()* @main, null, null, metadata !9, i32 3} ; [ DW_TAG_subprogram ] [line 3] [def] [main]
+!5 = metadata !{i32 786473, metadata !1}          ; [ DW_TAG_file_type ] [/tmp/dbginfo/const.cpp]
+!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = metadata !{metadata !8}
+!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
+!9 = metadata !{metadata !10, metadata !12}
+!10 = metadata !{i32 786688, metadata !4, metadata !"i", metadata !5, i32 4, metadata !11, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [i] [line 4]
+!11 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !8} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from int]
+!12 = metadata !{i32 786688, metadata !4, metadata !"j", metadata !5, i32 6, metadata !13, i32 0, i32 0} ; [ DW_TAG_auto_variable ] [j] [line 6]
+!13 = metadata !{i32 786470, null, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, metadata !14} ; [ DW_TAG_const_type ] [line 0, size 0, align 0, offset 0] [from unsigned int]
+!14 = metadata !{i32 786468, null, null, metadata !"unsigned int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 7} ; [ DW_TAG_base_type ] [unsigned int] [line 0, size 32, align 32, offset 0, enc DW_ATE_unsigned]
+!15 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
+!16 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
+!17 = metadata !{metadata !"clang version 3.5.0 "}
+!18 = metadata !{i32 42}
+!19 = metadata !{i32 4, i32 0, metadata !4, null}
+!20 = metadata !{i32 5, i32 0, metadata !4, null}
+!21 = metadata !{i32 117}
+!22 = metadata !{i32 6, i32 0, metadata !4, null}
+!23 = metadata !{i32 7, i32 0, metadata !4, null}
+!24 = metadata !{i32 8, i32 0, metadata !4, null} ; [ DW_TAG_imported_declaration ]
+