Rollup merge of #101997 - cuviper:drop-legacy-pm, r=nikic

Remove support for legacy PM

This removes support for optimizing with LLVM's legacy pass manager, as well as the unstable `-Znew-llvm-pass-manager` option. We have been defaulting to the new PM since LLVM 13 (except for s390x that waited for 14), and LLVM 15 removed support altogether. The only place we still use the legacy PM is for writing the output file, just like `llc` does.

cc #74705
r? ``@nikic``

1 files changed, 2 insertions, 72 deletions

diff --git a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
index 09f2c356897..42cb694c0e7 100644
--- a/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm/ffi.rs
@@ -1792,18 +1792,9 @@ extern "C" {
     /// Writes a module to the specified path. Returns 0 on success.
     pub fn LLVMWriteBitcodeToFile(M: &Module, Path: *const c_char) -> c_int;
 
-    /// Creates a pass manager.
+    /// Creates a legacy pass manager -- only used for final codegen.
     pub fn LLVMCreatePassManager<'a>() -> &'a mut PassManager<'a>;
 
-    /// Creates a function-by-function pass manager
-    pub fn LLVMCreateFunctionPassManagerForModule(M: &Module) -> &mut PassManager<'_>;
-
-    /// Disposes a pass manager.
-    pub fn LLVMDisposePassManager<'a>(PM: &'a mut PassManager<'a>);
-
-    /// Runs a pass manager on a module.
-    pub fn LLVMRunPassManager<'a>(PM: &PassManager<'a>, M: &'a Module) -> Bool;
-
     pub fn LLVMInitializePasses();
 
     pub fn LLVMTimeTraceProfilerInitialize();
@@ -1814,32 +1805,6 @@ extern "C" {
 
     pub fn LLVMAddAnalysisPasses<'a>(T: &'a TargetMachine, PM: &PassManager<'a>);
 
-    pub fn LLVMRustPassManagerBuilderCreate() -> &'static mut PassManagerBuilder;
-    pub fn LLVMRustPassManagerBuilderDispose(PMB: &'static mut PassManagerBuilder);
-    pub fn LLVMRustPassManagerBuilderUseInlinerWithThreshold(
-        PMB: &PassManagerBuilder,
-        threshold: c_uint,
-    );
-    pub fn LLVMRustPassManagerBuilderPopulateModulePassManager(
-        PMB: &PassManagerBuilder,
-        PM: &PassManager<'_>,
-    );
-
-    pub fn LLVMRustPassManagerBuilderPopulateFunctionPassManager(
-        PMB: &PassManagerBuilder,
-        PM: &PassManager<'_>,
-    );
-    pub fn LLVMRustPassManagerBuilderPopulateLTOPassManager(
-        PMB: &PassManagerBuilder,
-        PM: &PassManager<'_>,
-        Internalize: Bool,
-        RunInliner: Bool,
-    );
-    pub fn LLVMRustPassManagerBuilderPopulateThinLTOPassManager(
-        PMB: &PassManagerBuilder,
-        PM: &PassManager<'_>,
-    );
-
     pub fn LLVMGetHostCPUFeatures() -> *mut c_char;
 
     pub fn LLVMDisposeMessage(message: *mut c_char);
@@ -2244,22 +2209,6 @@ extern "C" {
 
     pub fn LLVMIsAConstantInt(value_ref: &Value) -> Option<&ConstantInt>;
 
-    pub fn LLVMRustFindAndCreatePass(Pass: *const c_char) -> Option<&'static mut Pass>;
-    pub fn LLVMRustCreateAddressSanitizerFunctionPass(Recover: bool) -> &'static mut Pass;
-    pub fn LLVMRustCreateModuleAddressSanitizerPass(Recover: bool) -> &'static mut Pass;
-    pub fn LLVMRustCreateMemorySanitizerPass(
-        TrackOrigins: c_int,
-        Recover: bool,
-    ) -> &'static mut Pass;
-    pub fn LLVMRustCreateThreadSanitizerPass() -> &'static mut Pass;
-    pub fn LLVMRustCreateHWAddressSanitizerPass(Recover: bool) -> &'static mut Pass;
-    pub fn LLVMRustAddPass(PM: &PassManager<'_>, Pass: &'static mut Pass);
-    pub fn LLVMRustAddLastExtensionPasses(
-        PMB: &PassManagerBuilder,
-        Passes: *const &'static mut Pass,
-        NumPasses: size_t,
-    );
-
     pub fn LLVMRustHasFeature(T: &TargetMachine, s: *const c_char) -> bool;
 
     pub fn LLVMRustPrintTargetCPUs(T: &TargetMachine);
@@ -2293,29 +2242,11 @@ extern "C" {
         SplitDwarfFile: *const c_char,
     ) -> Option<&'static mut TargetMachine>;
     pub fn LLVMRustDisposeTargetMachine(T: &'static mut TargetMachine);
-    pub fn LLVMRustAddBuilderLibraryInfo<'a>(
-        PMB: &'a PassManagerBuilder,
-        M: &'a Module,
-        DisableSimplifyLibCalls: bool,
-    );
-    pub fn LLVMRustConfigurePassManagerBuilder(
-        PMB: &PassManagerBuilder,
-        OptLevel: CodeGenOptLevel,
-        MergeFunctions: bool,
-        SLPVectorize: bool,
-        LoopVectorize: bool,
-        PrepareForThinLTO: bool,
-        PGOGenPath: *const c_char,
-        PGOUsePath: *const c_char,
-        PGOSampleUsePath: *const c_char,
-        SizeLevel: c_int,
-    );
     pub fn LLVMRustAddLibraryInfo<'a>(
         PM: &PassManager<'a>,
         M: &'a Module,
         DisableSimplifyLibCalls: bool,
     );
-    pub fn LLVMRustRunFunctionPassManager<'a>(PM: &PassManager<'a>, M: &'a Module);
     pub fn LLVMRustWriteOutputFile<'a>(
         T: &'a TargetMachine,
         PM: &PassManager<'a>,
@@ -2324,7 +2255,7 @@ extern "C" {
         DwoOutput: *const c_char,
         FileType: FileType,
     ) -> LLVMRustResult;
-    pub fn LLVMRustOptimizeWithNewPassManager<'a>(
+    pub fn LLVMRustOptimize<'a>(
         M: &'a Module,
         TM: &'a TargetMachine,
         OptLevel: PassBuilderOptLevel,
@@ -2362,7 +2293,6 @@ extern "C" {
     pub fn LLVMRustSetLLVMOptions(Argc: c_int, Argv: *const *const c_char);
     pub fn LLVMRustPrintPasses();
     pub fn LLVMRustSetNormalizedTarget(M: &Module, triple: *const c_char);
-    pub fn LLVMRustAddAlwaysInlinePass(P: &PassManagerBuilder, AddLifetimes: bool);
     pub fn LLVMRustRunRestrictionPass(M: &Module, syms: *const *const c_char, len: size_t);
 
     pub fn LLVMRustOpenArchive(path: *const c_char) -> Option<&'static mut Archive>;