Fix PR16143: Insert DEBUG_VALUE before terminator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182717 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 130 insertions, 0 deletions

diff --git a/test/CodeGen/X86/dbg-value-terminator.ll b/test/CodeGen/X86/dbg-value-terminator.ll
new file mode 100644
index 0000000000..ed0b2129a7
--- /dev/null
+++ b/test/CodeGen/X86/dbg-value-terminator.ll
@@ -0,0 +1,130 @@
+; RUN: llc -mtriple=x86_64-apple-macosx < %s -verify-machineinstrs | FileCheck %s
+;
+; PR16143: MachineOperand::setIsKill(bool): Assertion
+;
+; verify-machineinstrs should ensure that DEBUG_VALUEs go before the
+; terminator.
+;
+; CHECK: test:
+; CHECK: ##DEBUG_VALUE: :i
+%a = type { i32, i32 }
+
+define hidden fastcc %a* @test() #1 {
+entry:
+  %0 = icmp eq %a* undef, null, !dbg !1
+  br i1 %0, label %"14", label %return, !dbg !1
+
+"14":                                             ; preds = %"8"
+  br i1 undef, label %"25", label %"21", !dbg !1
+
+"21":                                             ; preds = %"14"
+  br i1 undef, label %may_unswitch_on.exit, label %"6.i", !dbg !1
+
+"6.i":                                            ; preds = %"21"
+  br i1 undef, label %"10.i", label %may_unswitch_on.exit, !dbg !1
+
+"10.i":                                           ; preds = %"6.i"
+  br i1 undef, label %may_unswitch_on.exit, label %"12.i", !dbg !1
+
+"12.i":                                           ; preds = %"10.i"
+  br i1 undef, label %"4.i.i", label %"3.i.i", !dbg !1
+
+"3.i.i":                                          ; preds = %"12.i"
+  br i1 undef, label %"4.i.i", label %VEC_edge_base_index.exit.i, !dbg !1
+
+"4.i.i":                                          ; preds = %"3.i.i", %"12.i"
+  unreachable, !dbg !1
+
+VEC_edge_base_index.exit.i:                       ; preds = %"3.i.i"
+  br i1 undef, label %may_unswitch_on.exit, label %"16.i", !dbg !1
+
+"16.i":                                           ; preds = %VEC_edge_base_index.exit.i
+  br i1 undef, label %"4.i6.i", label %"3.i5.i", !dbg !1
+
+"3.i5.i":                                         ; preds = %"16.i"
+  br i1 undef, label %VEC_edge_base_index.exit7.i, label %"4.i6.i", !dbg !1
+
+"4.i6.i":                                         ; preds = %"3.i5.i", %"16.i"
+  unreachable, !dbg !1
+
+VEC_edge_base_index.exit7.i:                      ; preds = %"3.i5.i"
+  br i1 undef, label %may_unswitch_on.exit, label %"21.i", !dbg !1
+
+"21.i":                                           ; preds = %VEC_edge_base_index.exit7.i
+  br i1 undef, label %may_unswitch_on.exit, label %"23.i", !dbg !1
+
+"23.i":                                           ; preds = %"21.i"
+  br i1 undef, label %may_unswitch_on.exit, label %"26.i", !dbg !1
+
+"26.i":                                           ; preds = %"34.i", %"23.i"
+  %1 = icmp eq i32 undef, 9, !dbg !1
+  br i1 %1, label %"34.i", label %"28.i", !dbg !1
+
+"28.i":                                           ; preds = %"26.i"
+  unreachable
+
+"34.i":                                           ; preds = %"26.i"
+  br i1 undef, label %"26.i", label %"36.i", !dbg !1
+
+"36.i":                                           ; preds = %"34.i"
+  br i1 undef, label %"37.i", label %"38.i", !dbg !1
+
+"37.i":                                           ; preds = %"36.i"
+  br label %"38.i", !dbg !1
+
+"38.i":                                           ; preds = %"37.i", %"36.i"
+  br i1 undef, label %"39.i", label %"45.i", !dbg !1
+
+"39.i":                                           ; preds = %"38.i"
+  br i1 undef, label %"41.i", label %may_unswitch_on.exit, !dbg !1
+
+"41.i":                                           ; preds = %"39.i"
+  br i1 undef, label %may_unswitch_on.exit, label %"42.i", !dbg !1
+
+"42.i":                                           ; preds = %"41.i"
+  br i1 undef, label %may_unswitch_on.exit, label %"44.i", !dbg !1
+
+"44.i":                                           ; preds = %"42.i"
+  %2 = load %a** undef, align 8, !dbg !1
+  %3 = bitcast %a* %2 to %a*, !dbg !1
+  call void @llvm.dbg.value(metadata !{%a* %3}, i64 0, metadata !6), !dbg !12
+  br label %may_unswitch_on.exit, !dbg !1
+
+"45.i":                                           ; preds = %"38.i"
+  unreachable
+
+may_unswitch_on.exit:                             ; preds = %"44.i", %"42.i", %"41.i", %"39.i", %"23.i", %"21.i", %VEC_edge_base_index.exit7.i, %VEC_edge_base_index.exit.i, %"10.i", %"6.i", %"21"
+  %4 = phi %a* [ %3, %"44.i" ], [ null, %"6.i" ], [ null, %"10.i" ], [ null, %VEC_edge_base_index.exit7.i ], [ null, %VEC_edge_base_index.exit.i ], [ null, %"21.i" ], [ null, %"23.i" ], [ null, %"39.i" ], [ null, %"42.i" ], [ null, %"41.i" ], [ null, %"21" ]
+  br label %return
+
+"25":                                             ; preds = %"14"
+  unreachable
+
+"return":
+  %result = phi %a* [ null, %entry ], [ %4, %may_unswitch_on.exit ]
+  ret %a* %result, !dbg !1
+}
+
+attributes #0 = { nounwind readnone }
+attributes #1 = { nounwind uwtable }
+
+declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
+
+!llvm.dbg.cu = !{!0}
+
+!0 = metadata !{i32 786449, metadata !20, i32 12, metadata !"Apple clang version", i1 true, metadata !"", i32 0, null, null, metadata !18, null,  null, null} ; [ DW_TAG_compile_unit ]
+!1 = metadata !{i32 786478, metadata !2, metadata !"foo", metadata !"foo", metadata !"", metadata !2, i32 2, metadata !3, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 true, %a* ()* @test, null, null, metadata !19, i32 0} ; [ DW_TAG_subprogram ]
+!2 = metadata !{i32 786473, metadata !20} ; [ DW_TAG_file_type ]
+!3 = metadata !{i32 786453, metadata !2, metadata !"", metadata !2, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !4, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
+!4 = metadata !{metadata !5}
+!5 = metadata !{i32 786468, metadata !0, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
+!6 = metadata !{i32 786689, metadata !1, metadata !"i", metadata !2, i32 16777218, metadata !5, i32 0, null} ; [ DW_TAG_arg_variable ]
+!7 = metadata !{i32 786689, metadata !1, metadata !"c", metadata !2, i32 33554434, metadata !8, i32 0, null} ; [ DW_TAG_arg_variable ]
+!8 = metadata !{i32 786447, metadata !0, metadata !"", null, i32 0, i64 64, i64 64, i64 0, i32 0, metadata !9} ; [ DW_TAG_pointer_type ]
+!9 = metadata !{i32 786468, metadata !0, metadata !"char", null, i32 0, i64 8, i64 8, i64 0, i32 0, i32 6} ; [ DW_TAG_base_type ]
+!10 = metadata !{i32 786688, metadata !11, metadata !"a", metadata !2, i32 3, metadata !9, i32 0, null} ; [ DW_TAG_auto_variable ]
+!11 = metadata !{i32 786443, metadata !20, metadata !1, i32 2, i32 25, i32 0} ; [ DW_TAG_lexical_block ]
+!12 = metadata !{i32 2, i32 13, metadata !1, null}
+!18 = metadata !{metadata !1}
+!19 = metadata !{metadata !6, metadata !7, metadata !10}
+!20 = metadata !{metadata !"a.c", metadata !"/private/tmp"}