Add a separate testcase for a DWARF expression describing a value in a

subregister.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215161 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/DebugInfo/ARM/s-super-register.ll b/test/DebugInfo/ARM/s-super-register.ll
new file mode 100644 (file)
index 0000000..5040a79
--- /dev/null
+++ b/test/DebugInfo/ARM/s-super-register.ll
@@ -0,0 +1,63 @@
+; RUN: llc < %s - -filetype=obj | llvm-dwarfdump -debug-dump=loc - | FileCheck %s
+target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"
+target triple = "thumbv7-apple-macosx10.6.7"
+
+; The S registers on ARM are expressed as pieces of their super-registers in DWARF.
+;
+; 0x90   DW_OP_regx of super-register
+; 0x93   DW_OP_piece
+; 0x9d   DW_OP_bit_piece
+; CHECK:            Location description: 90 {{.. .. ((93 ..)|(9d .. ..))}}
+
+define void @_Z3foov() optsize ssp {
+entry:
+  %call = tail call float @_Z3barv() optsize, !dbg !11
+  tail call void @llvm.dbg.value(metadata !{float %call}, i64 0, metadata !5), !dbg !11
+  %call16 = tail call float @_Z2f2v() optsize, !dbg !12
+  %cmp7 = fcmp olt float %call, %call16, !dbg !12
+  br i1 %cmp7, label %for.body, label %for.end, !dbg !12
+
+for.body:                                         ; preds = %entry, %for.body
+  %k.08 = phi float [ %inc, %for.body ], [ %call, %entry ]
+  %call4 = tail call float @_Z2f3f(float %k.08) optsize, !dbg !13
+  %inc = fadd float %k.08, 1.000000e+00, !dbg !14
+  %call1 = tail call float @_Z2f2v() optsize, !dbg !12
+  %cmp = fcmp olt float %inc, %call1, !dbg !12
+  br i1 %cmp, label %for.body, label %for.end, !dbg !12
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void, !dbg !15
+}
+
+declare float @_Z3barv() optsize
+
+declare float @_Z2f2v() optsize
+
+declare float @_Z2f3f(float) optsize
+
+declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!20}
+
+!0 = metadata !{i32 786449, metadata !18, i32 4, metadata !"clang version 3.0 (trunk 130845)", i1 true, metadata !"", i32 0, metadata !19, metadata !19, metadata !16, null,  null, null, i32 1} ; [ DW_TAG_compile_unit ]
+!1 = metadata !{i32 786478, metadata !18, metadata !2, metadata !"foo", metadata !"foo", metadata !"_Z3foov", i32 5, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @_Z3foov, null, null, metadata !17, i32 5} ; [ DW_TAG_subprogram ] [line 5] [def] [foo]
+!2 = metadata !{i32 786473, metadata !18} ; [ DW_TAG_file_type ]
+!3 = metadata !{i32 786453, metadata !18, 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 !{null}
+!5 = metadata !{i32 786688, metadata !6, metadata !"k", metadata !2, i32 6, metadata !7, i32 0, null} ; [ DW_TAG_auto_variable ]
+!6 = metadata !{i32 786443, metadata !18, metadata !1, i32 5, i32 12, i32 0} ; [ DW_TAG_lexical_block ]
+!7 = metadata !{i32 786468, null, metadata !0, metadata !"float", i32 0, i64 32, i64 32, i64 0, i32 0, i32 4} ; [ DW_TAG_base_type ]
+!8 = metadata !{i32 786688, metadata !9, metadata !"y", metadata !2, i32 8, metadata !7, i32 0, null} ; [ DW_TAG_auto_variable ]
+!9 = metadata !{i32 786443, metadata !18, metadata !10, i32 7, i32 25, i32 2} ; [ DW_TAG_lexical_block ]
+!10 = metadata !{i32 786443, metadata !18, metadata !6, i32 7, i32 3, i32 1} ; [ DW_TAG_lexical_block ]
+!11 = metadata !{i32 6, i32 18, metadata !6, null}
+!12 = metadata !{i32 7, i32 3, metadata !6, null}
+!13 = metadata !{i32 8, i32 20, metadata !9, null}
+!14 = metadata !{i32 7, i32 20, metadata !10, null}
+!15 = metadata !{i32 10, i32 1, metadata !6, null}
+!16 = metadata !{metadata !1}
+!17 = metadata !{metadata !5, metadata !8}
+!18 = metadata !{metadata !"k.cc", metadata !"/private/tmp"}
+!19 = metadata !{i32 0}
+!20 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}