--- /dev/null
+# RUN: llc -emit-call-site-info -start-after=machineverifier -filetype=obj -o - %s \
+# RUN: | llvm-dwarfdump - | FileCheck %s --implicit-check-not=DW_TAG_GNU_call_site_parameter
+
+## This test would previously trigger an assertion when trying to describe the
+## call site value for the MOV16ri instruction.
+## Based on the following reproducer:
+## a(short);
+## b() { a(1); }
+
+--- |
+ target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+ target triple = "x86_64-w64-windows-gnu"
+
+ ; Function Attrs: nounwind uwtable
+ define dso_local i32 @b() local_unnamed_addr !dbg !14 {
+ entry:
+ %call = tail call i32 @a(i16 1), !dbg !17
+ ret i32 undef, !dbg !18
+ }
+
+ declare !dbg !4 dso_local i32 @a(i16) local_unnamed_addr
+
+ !llvm.dbg.cu = !{!0}
+ !llvm.module.flags = !{!9, !10, !11, !12}
+ !llvm.ident = !{!13}
+
+ !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
+ !1 = !DIFile(filename: "1.c", directory: "/")
+ !2 = !{}
+ !3 = !{!4}
+ !4 = !DISubprogram(name: "a", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
+ !5 = !DISubroutineType(types: !6)
+ !6 = !{!7, !8}
+ !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+ !8 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
+ !9 = !{i32 7, !"Dwarf Version", i32 4}
+ !10 = !{i32 2, !"Debug Info Version", i32 3}
+ !11 = !{i32 1, !"wchar_size", i32 2}
+ !12 = !{i32 7, !"PIC Level", i32 2}
+ !13 = !{!"clang version 11.0.0"}
+ !14 = distinct !DISubprogram(name: "b", scope: !1, file: !1, line: 3, type: !15, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
+ !15 = !DISubroutineType(types: !16)
+ !16 = !{!7}
+ !17 = !DILocation(line: 4, column: 3, scope: !14)
+ !18 = !DILocation(line: 5, column: 1, scope: !14)
+
+...
+---
+name: b
+alignment: 16
+callSites:
+ - { bb: 0, offset: 1, fwdArgRegs:
+ - { arg: 0, reg: '$cx' } }
+body: |
+ bb.0.entry:
+ $cx = MOV16ri 1, debug-location !17
+ TAILJMPd64 @a, csr_win64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $cx, debug-location !17
+
+...