[llvm] [DWARF] Avoid repeated hash lookups (NFC) (PR #110202)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata updated https://github.com/llvm/llvm-project/pull/110202

>From 70cffbb22975ab58d9a4291cec80430c2ef9a2f6 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Thu, 26 Sep 2024 08:26:54 -0700
Subject: [PATCH] [DWARF] Avoid repeated hash lookups (NFC)

---
 llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp b/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp
index eb2751ab30ac50..fa3e8ad21dbd4d 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFVerifier.cpp
@@ -1014,10 +1014,8 @@ void DWARFVerifier::verifyDebugLineRows() {
           DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, FullPath);
       assert(HasFullPath && "Invalid index?");
       (void)HasFullPath;
-      auto It = FullPathMap.find(FullPath);
-      if (It == FullPathMap.end())
-        FullPathMap[FullPath] = FileIndex;
-      else if (It->second != FileIndex && DumpOpts.Verbose) {
+      auto [It, Inserted] = FullPathMap.try_emplace(FullPath, FileIndex);
+      if (!Inserted && It->second != FileIndex && DumpOpts.Verbose) {
         warn() << ".debug_line["
                << format("0x%08" PRIx64,
                          *toSectionOffset(Die.find(DW_AT_stmt_list)))