[Debug info] `discard` has slightly wrong debug location

Version: dxcompiler.dll 1.9(5402-0d3ee6b5)(1.9.0.5402) - 1.9.0.5402 (0d3ee6b55-dirty)
Repro: discard_location.zip

dxc -T ps_6_0 -Zi -Qembed_debug -Od -Fc dis

card_location.ll discard_location.hlsl

 5  float4 main(float2 uv : TEXCOORD0) : SV_Target
 6  {
 7      if (uv.x < 0.1)
 8      {
 9          discard;                     // line 9, col 9
10      }
11
12      if (uv.x < 0.2)
13          discard;                     // line 13, col 9
14
15      if (uv.x < 0.3) discard;         // line 15, col 21
16
17      discard;                         // line 17, col 5
18
19      return float4(uv, 0, 1);
20  }

Actual

call void @dx.op.discard(i32 82, i1 true), !dbg !57   ; line:8  col:5
call void @dx.op.discard(i32 82, i1 true), !dbg !62   ; line:12 col:9
call void @dx.op.discard(i32 82, i1 true), !dbg !65   ; line:15 col:9
call void @dx.op.discard(i32 82, i1 true), !dbg !66   ; line:15 col:16

Start with the attached discard_location.zip and run the reported dxc command to reproduce the generated LLVM and its debug locations. Trace how the four discard forms in the HLSL source produce their metadata, then verify the output locations match the annotated source lines and columns.