From bb6dcf5f740f6147eaf8774509ca27adc47c009b Mon Sep 17 00:00:00 2001
From: Liu Dingming <liudingming@bytedance.com>
Date: Thu, 7 Sep 2023 17:34:41 +0800
Subject: [PATCH 1/2] Add `RegisterCodeGenFlags` to get full codegen flags list

---
 compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 4ac739326d2dd..4b30a4fefd9d9 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -9,6 +9,7 @@
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/CodeGen/CommandFlags.h"
 #include "llvm/CodeGen/TargetSubtargetInfo.h"
 #include "llvm/IR/AutoUpgrade.h"
 #include "llvm/IR/AssemblyAnnotationWriter.h"
@@ -50,6 +51,8 @@
 
 using namespace llvm;
 
+static codegen::RegisterCodeGenFlags CGF;
+
 typedef struct LLVMOpaquePass *LLVMPassRef;
 typedef struct LLVMOpaqueTargetMachine *LLVMTargetMachineRef;
 

From 487766cef0faa12c3e744b8c754ea7c58427ec2f Mon Sep 17 00:00:00 2001
From: Liu Dingming <liudingming@bytedance.com>
Date: Thu, 7 Sep 2023 17:36:21 +0800
Subject: [PATCH 2/2] Using parsed codegen flags

---
 compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 4b30a4fefd9d9..194ebe6d96890 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -424,7 +424,7 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
     return nullptr;
   }
 
-  TargetOptions Options;
+  TargetOptions Options = codegen::InitTargetOptionsFromCodeGenFlags(Trip);
 
   Options.FloatABIType = FloatABI::Default;
   if (UseSoftFloat) {