1 files changed, 79 insertions, 0 deletions
diff --git a/test/DebugInfo/X86/pieces-1.ll b/test/DebugInfo/X86/pieces-1.ll
new file mode 100644
index 000000000000..4c11a8b969cd
--- /dev/null
+++ b/test/DebugInfo/X86/pieces-1.ll
@@ -0,0 +1,79 @@
+; RUN: llc -O0 %s -filetype=obj -o %t.o
+; RUN: llvm-dwarfdump -debug-dump=loc %t.o | FileCheck %s
+;
+; rdar://problem/15928306
+;
+; Test that we can emit debug info for aggregate values that are split
+; up across multiple registers by SROA.
+;
+;    // Compile with -O1.
+;    typedef struct { long int a; int b;} S;
+;
+;    int foo(S s) {
+;            return s.b;
+;    }
+;
+;
+; CHECK: .debug_loc contents:
+;
+
+; 0x0000000000000000 - 0x0000000000000006: rdi, piece 0x00000008, rsi, piece 0x00000004
+; CHECK:            Beginning address offset: 0x0000000000000000
+; CHECK:               Ending address offset: [[LTMP3:.*]]
+; CHECK:                Location description: 55 93 08 54 93 04
+; 0x0000000000000006 - 0x0000000000000008: rbp-8, piece 0x00000008, rax, piece 0x00000004 )
+; CHECK:            Beginning address offset: [[LTMP3]]
+; CHECK:               Ending address offset: [[END:.*]]
+; CHECK:                Location description: 76 78 93 08 54 93 04
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.9.0"
+
+; Function Attrs: nounwind ssp uwtable
+define i32 @foo(i64 %s.coerce0, i32 %s.coerce1) #0 {
+entry:
+  call void @llvm.dbg.value(metadata i64 %s.coerce0, i64 0, metadata !20, metadata !24), !dbg !21
+  call void @llvm.dbg.value(metadata i32 %s.coerce1, i64 0, metadata !22, metadata !27), !dbg !21
+  ret i32 %s.coerce1, !dbg !23
+}
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
+
+; Function Attrs: nounwind readnone
+declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
+
+attributes #0 = { nounwind ssp uwtable "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" }
+attributes #1 = { nounwind readnone }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!17, !18}
+!llvm.ident = !{!19}
+
+!0 = !{!"0x11\0012\00clang version 3.5 \001\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ]
+!1 = !{!"pieces.c", !""}
+!2 = !{}
+!3 = !{!4}
+!4 = !{!"0x2e\00foo\00foo\00\003\000\001\000\006\00256\001\003", !1, !5, !6, null, i32 (i64, i32)* @foo, null, null, !15} ; [ DW_TAG_subprogram ] [line 3] [def] [foo]
+!5 = !{!"0x29", !1}          ; [ DW_TAG_file_type ] [/pieces.c]
+!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
+!7 = !{!8, !9}
+!8 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
+!9 = !{!"0x16\00S\001\000\000\000\000", !1, null, !10} ; [ DW_TAG_typedef ] [S] [line 1, size 0, align 0, offset 0] [from ]
+!10 = !{!"0x13\00\001\00128\0064\000\000\000", !1, null, null, !11, null, null, null} ; [ DW_TAG_structure_type ] [line 1, size 128, align 64, offset 0] [def] [from ]
+!11 = !{!12, !14}
+!12 = !{!"0xd\00a\001\0064\0064\000\000", !1, !10, !13} ; [ DW_TAG_member ] [a] [line 1, size 64, align 64, offset 0] [from long int]
+!13 = !{!"0x24\00long int\000\0064\0064\000\000\005", null, null} ; [ DW_TAG_base_type ] [long int] [line 0, size 64, align 64, offset 0, enc DW_ATE_signed]
+!14 = !{!"0xd\00b\001\0032\0032\0064\000", !1, !10, !8} ; [ DW_TAG_member ] [b] [line 1, size 32, align 32, offset 64] [from int]
+!15 = !{!16}
+!16 = !{!"0x101\00s\0016777219\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [s] [line 3]
+!17 = !{i32 2, !"Dwarf Version", i32 4}
+!18 = !{i32 1, !"Debug Info Version", i32 2}
+!19 = !{!"clang version 3.5 "}
+!20 = !{!"0x101\00s\0016777219\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [s] [line 3]
+!21 = !MDLocation(line: 3, scope: !4)
+!22 = !{!"0x101\00s\0016777219\000", !4, !5, !9} ; [ DW_TAG_arg_variable ] [s] [line 3]
+!23 = !MDLocation(line: 4, scope: !4)
+!24 = !{!"0x102\00147\000\008"} ; [ DW_TAG_expression ] [DW_OP_piece 0 8] [piece, size 8, offset 0]
+!25 = !{}
+!27 = !{!"0x102\00147\008\004"} ; [ DW_TAG_expression ] [DW_OP_piece 8 4] [piece, size 4, offset 8]