1 files changed, 80 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/SystemZ/debuginstr-01.mir b/llvm/test/CodeGen/SystemZ/debuginstr-01.mir
new file mode 100644
index 00000000000..bcc7f547941
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/debuginstr-01.mir
@@ -0,0 +1,80 @@
+# Check that the backend can produce a load-and-trap instruction also in
+# the presence of a DEBUG_VALUE machine instruction.
+#
+# RUN: llc %s -mtriple=s390x-linux-gnu -mcpu=zEC12 -start-before=postrapseudos \
+# RUN:   -o - 2>&1 | FileCheck %s
+#
+# CHECK: lat
+
+--- |
+  
+  define i32 @f1(i32* %ptr) #1 {
+  entry:
+    %val = load i32, i32* %ptr
+    ; Keep the dbg metadata live by referencing it in the IR.
+    call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !7, metadata !DIExpression()), !dbg !9
+    %cmp = icmp eq i32 %val, 0
+    br i1 %cmp, label %if.then, label %if.end
+  
+  if.then:                                          ; preds = %entry
+    tail call void @llvm.trap()
+    unreachable
+  
+  if.end:                                           ; preds = %entry
+    ret i32 %val
+  }
+  
+  declare void @llvm.trap() #0
+  declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
+  
+  declare void @llvm.stackprotector(i8*, i8**) #2
+
+  attributes #0 = { cold noreturn nounwind "target-cpu"="zEC12" }
+  attributes #1 = { "target-cpu"="zEC12" }
+  attributes #2 = { nounwind }
+
+  !llvm.dbg.cu = !{!0}
+  !llvm.module.flags = !{!3, !4}
+
+  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "llvm", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
+  !1 = !DIFile(filename: "test.ll", directory: "/tmp")
+  !2 = !{}
+  !3 = !{i32 2, !"Dwarf Version", i32 4}
+  !4 = !{i32 2, !"Debug Info Version", i32 3}
+  !5 = distinct !DISubprogram(name: "test_dbg_value", scope: !1, file: !1, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
+  !6 = !DISubroutineType(types: !2)
+  !7 = !DILocalVariable(name: "in", arg: 1, scope: !5, file: !1, line: 1, type: !8)
+  !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+  !9 = !DILocation(line: 1, column: 1, scope: !5)
+
+...
+---
+name:            f1
+alignment:       4
+tracksRegLiveness: true
+liveins:         
+  - { reg: '$r2d' }
+frameInfo:       
+  maxCallFrameSize: 0
+body:             |
+  bb.0.entry:
+    successors: %bb.1(0x00000001), %bb.2(0x7fffffff)
+    liveins: $r2d
+  
+    renamable $r2l = LMux killed renamable $r2d, 0, $noreg :: (load 4 from %ir.ptr)
+    DBG_VALUE $noreg, $r2l, !7, !DIExpression(), debug-location !9
+    CHIMux renamable $r2l, 0, implicit-def $cc
+    DBG_VALUE $noreg, $r2l, !7, !DIExpression(), debug-location !9
+    BRC 14, 6, %bb.2, implicit killed $cc
+  
+  bb.1.if.then:
+    successors: 
+  
+    Trap
+  
+  bb.2.if.end:
+    liveins: $r2l
+  
+    Return implicit $r2l
+
+...