[llvm] [SDAG] Use useDebugInstrRef instead of shouldUseDebugInstrRef (PR #160686)

[Mikołaj Piróg via llvm-commits]

https://github.com/mikolaj-pirog updated https://github.com/llvm/llvm-project/pull/160686

>From d73e3a7cb9528b0dc890dd7cfb7689f1a182e207 Mon Sep 17 00:00:00 2001
From: "Pirog, Mikolaj Maciej" <mikolaj.maciej.pirog at intel.com>
Date: Thu, 25 Sep 2025 13:09:34 +0200
Subject: [PATCH 1/2] Use useDebugInstrRef instead of shouldUseDebugInstrRef

---
 llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index e61558c59bf0d..214edfc7c07f3 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -566,7 +566,7 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) {
   SwiftError->setFunction(mf);
   const Function &Fn = mf.getFunction();
 
-  bool InstrRef = mf.shouldUseDebugInstrRef();
+  bool InstrRef = mf.useDebugInstrRef();
 
   FuncInfo->set(MF->getFunction(), *MF, CurDAG);
 

>From 9203e781fc0f6a106caaaa879913daa4e270d554 Mon Sep 17 00:00:00 2001
From: "Pirog, Mikolaj Maciej" <mikolaj.maciej.pirog at intel.com>
Date: Tue, 7 Oct 2025 10:42:38 +0200
Subject: [PATCH 2/2] Add test

---
 .../DebugInfo/X86/instr-ref-opt-bisect2.ll    | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 llvm/test/DebugInfo/X86/instr-ref-opt-bisect2.ll

diff --git a/llvm/test/DebugInfo/X86/instr-ref-opt-bisect2.ll b/llvm/test/DebugInfo/X86/instr-ref-opt-bisect2.ll
new file mode 100644
index 0000000000000..19e0965938a43
--- /dev/null
+++ b/llvm/test/DebugInfo/X86/instr-ref-opt-bisect2.ll
@@ -0,0 +1,37 @@
+; RUN: llc %s -o - -stop-after=livedebugvalues -opt-bisect-limit=1 | FileCheck %s
+; RUN: llc %s -o - -stop-after=livedebugvalues -opt-bisect-limit=10 | FileCheck %s
+; RUN: llc %s -o - -stop-after=livedebugvalues -opt-bisect-limit=100 | FileCheck %s
+
+; RUN: llc %s -o - -stop-after=livedebugvalues -opt-bisect-limit=1 -fast-isel=true | FileCheck %s
+; RUN: llc %s -o - -stop-after=livedebugvalues -opt-bisect-limit=10 -fast-isel=true | FileCheck %s
+; RUN: llc %s -o - -stop-after=livedebugvalues -opt-bisect-limit=100 -fast-isel=true | FileCheck %s
+
+; This test has the same purpose as the instr-ref-opt-bisect.ll, to check if
+; during opt-bisect's optimisation level change we won't run into an assert.
+; This is simply testing different IR.
+
+; CHECK: DBG_VALUE
+
+target triple = "x86_64-pc-windows-msvc"
+
+define i1 @foo(i32 %arg) !dbg !3 {
+entry:
+    #dbg_value(i32 %arg, !4, !DIExpression(), !5)
+  switch i32 %arg, label %bb [
+    i32 810, label %bb
+  ], !dbg !5
+bb:
+  %a = load volatile i1, ptr null, align 1
+  ret i1 false
+}
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!2}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, emissionKind: FullDebug)
+!1 = !DIFile(filename: "instr-ref-opt-bisect2.ll", directory: ".")
+!2 = !{i32 2, !"Debug Info Version", i32 3}
+!3 = distinct !DISubprogram(name: "CheckBuiltinFunctionCall",  file: !1,  unit: !0)
+!4 = !DILocalVariable(name: "arg", arg: 2, scope: !3)
+!5 = !DILocation(line: 0, scope: !3)
+