[llvm] [SPIR-V] Improve portability of the code (PR #123584)

[Vyacheslav Levytskyy via llvm-commits]

https://github.com/VyacheslavLevytskyy created https://github.com/llvm/llvm-project/pull/123584

Adding SPIRV to LLVM_ALL_TARGETS (https://github.com/llvm/llvm-project/pull/119653) revealed a series of minor compilation problems and sanitizer complaints. This PR is to address the problem.

>From 75cf05aea8cdec1b605ad697a8dbe89a1f3e3397 Mon Sep 17 00:00:00 2001
From: "Levytskyy, Vyacheslav" <vyacheslav.levytskyy at intel.com>
Date: Mon, 20 Jan 2025 02:52:56 -0800
Subject: [PATCH] improve portability of the code

---
 llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp         | 10 +++++-----
 llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp |  6 ++----
 llvm/lib/Target/SPIRV/SPIRVUtils.h              |  1 +
 3 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
index e236d646e66fc1..784bbe8e662c20 100644
--- a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
@@ -535,15 +535,15 @@ extern Register insertAssignInstr(Register Reg, Type *Ty, SPIRVType *SpirvTy,
 static SPIRV::MemorySemantics::MemorySemantics
 getSPIRVMemSemantics(std::memory_order MemOrder) {
   switch (MemOrder) {
-  case std::memory_order::memory_order_relaxed:
+  case std::memory_order_relaxed:
     return SPIRV::MemorySemantics::None;
-  case std::memory_order::memory_order_acquire:
+  case std::memory_order_acquire:
     return SPIRV::MemorySemantics::Acquire;
-  case std::memory_order::memory_order_release:
+  case std::memory_order_release:
     return SPIRV::MemorySemantics::Release;
-  case std::memory_order::memory_order_acq_rel:
+  case std::memory_order_acq_rel:
     return SPIRV::MemorySemantics::AcquireRelease;
-  case std::memory_order::memory_order_seq_cst:
+  case std::memory_order_seq_cst:
     return SPIRV::MemorySemantics::SequentiallyConsistent;
   default:
     report_fatal_error("Unknown CL memory scope");
diff --git a/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp b/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp
index ecf9b6ddae1fc3..028699e56a9469 100644
--- a/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp
@@ -22,6 +22,7 @@
 #include "SPIRVSubtarget.h"
 #include "SPIRVTargetMachine.h"
 #include "SPIRVUtils.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Analysis/ValueTracking.h"
 #include "llvm/CodeGen/IntrinsicLowering.h"
 #include "llvm/IR/IRBuilder.h"
@@ -30,7 +31,6 @@
 #include "llvm/IR/IntrinsicsSPIRV.h"
 #include "llvm/Transforms/Utils/Cloning.h"
 #include "llvm/Transforms/Utils/LowerMemIntrinsics.h"
-#include <charconv>
 #include <regex>
 
 using namespace llvm;
@@ -228,9 +228,7 @@ static SmallVector<Metadata *> parseAnnotation(Value *I,
         } else {
           MDsItem.push_back(MDString::get(Ctx, Item));
         }
-      } else if (int32_t Num;
-                 std::from_chars(Item.data(), Item.data() + Item.size(), Num)
-                     .ec == std::errc{}) {
+      } else if (int32_t Num; llvm::to_integer(StringRef(Item), Num, 10)) {
         MDsItem.push_back(
             ConstantAsMetadata::get(ConstantInt::get(Int32Ty, Num)));
       } else {
diff --git a/llvm/lib/Target/SPIRV/SPIRVUtils.h b/llvm/lib/Target/SPIRV/SPIRVUtils.h
index 60649eac628151..fd48098257065a 100644
--- a/llvm/lib/Target/SPIRV/SPIRVUtils.h
+++ b/llvm/lib/Target/SPIRV/SPIRVUtils.h
@@ -22,6 +22,7 @@
 #include "llvm/IR/TypedPointerType.h"
 #include <queue>
 #include <string>
+#include <unordered_map>
 #include <unordered_set>
 
 namespace llvm {