Rollup merge of rust-lang#47173 - dotdash:cleanup, r=michaelwoerister

Remove some outdated LLVM-related code

Ticks two boxes on rust-lang#46437

Author: kennytm

src/librustc_llvm/ffi.rs

@@ -538,9 +538,6 @@ extern "C" {
     /// See llvm::LLVMTypeKind::getTypeID.
     pub fn LLVMRustGetTypeKind(Ty: TypeRef) -> TypeKind;
 
-    /// See llvm::Value::getContext
-    pub fn LLVMRustGetValueContext(V: ValueRef) -> ContextRef;
-
     // Operations on integer types
     pub fn LLVMInt1TypeInContext(C: ContextRef) -> TypeRef;
     pub fn LLVMInt8TypeInContext(C: ContextRef) -> TypeRef;
@@ -812,13 +809,12 @@ extern "C" {
                                Bundle: OperandBundleDefRef,
                                Name: *const c_char)
                                -> ValueRef;
-    pub fn LLVMRustBuildLandingPad(B: BuilderRef,
-                                   Ty: TypeRef,
-                                   PersFn: ValueRef,
-                                   NumClauses: c_uint,
-                                   Name: *const c_char,
-                                   F: ValueRef)
-                                   -> ValueRef;
+    pub fn LLVMBuildLandingPad(B: BuilderRef,
+                               Ty: TypeRef,
+                               PersFn: ValueRef,
+                               NumClauses: c_uint,
+                               Name: *const c_char)
+                               -> ValueRef;
     pub fn LLVMBuildResume(B: BuilderRef, Exn: ValueRef) -> ValueRef;
     pub fn LLVMBuildUnreachable(B: BuilderRef) -> ValueRef;
 

src/librustc_trans/builder.rs

@@ -1012,12 +1012,11 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
     }
 
     pub fn landing_pad(&self, ty: Type, pers_fn: ValueRef,
-                       num_clauses: usize,
-                       llfn: ValueRef) -> ValueRef {
+                       num_clauses: usize) -> ValueRef {
         self.count_insn("landingpad");
         unsafe {
-            llvm::LLVMRustBuildLandingPad(self.llbuilder, ty.to_ref(), pers_fn,
-                                          num_clauses as c_uint, noname(), llfn)
+            llvm::LLVMBuildLandingPad(self.llbuilder, ty.to_ref(), pers_fn,
+                                      num_clauses as c_uint, noname())
         }
     }
 

src/librustc_trans/intrinsic.rs

@@ -925,7 +925,7 @@ fn trans_gnu_try<'a, 'tcx>(bcx: &Builder<'a, 'tcx>,
         // rust_try ignores the selector.
         let lpad_ty = Type::struct_(ccx, &[Type::i8p(ccx), Type::i32(ccx)],
                                     false);
-        let vals = catch.landing_pad(lpad_ty, bcx.ccx.eh_personality(), 1, catch.llfn());
+        let vals = catch.landing_pad(lpad_ty, bcx.ccx.eh_personality(), 1);
         catch.add_clause(vals, C_null(Type::i8p(ccx)));
         let ptr = catch.extract_value(vals, 0);
         let ptr_align = bcx.tcx().data_layout.pointer_align;

src/librustc_trans/mir/block.rs

@@ -753,7 +753,7 @@ impl<'a, 'tcx> MirContext<'a, 'tcx> {
 
         let llpersonality = self.ccx.eh_personality();
         let llretty = self.landing_pad_type();
-        let lp = bcx.landing_pad(llretty, llpersonality, 1, self.llfn);
+        let lp = bcx.landing_pad(llretty, llpersonality, 1);
         bcx.set_cleanup(lp);
 
         let slot = self.get_personality_slot(&bcx);

src/rustllvm/RustWrapper.cpp

@@ -1144,13 +1144,6 @@ extern "C" void LLVMRustWriteSMDiagnosticToString(LLVMSMDiagnosticRef D,
   unwrap(D)->print("", OS);
 }
 
-extern "C" LLVMValueRef
-LLVMRustBuildLandingPad(LLVMBuilderRef B, LLVMTypeRef Ty,
-                        LLVMValueRef PersFn, unsigned NumClauses,
-                        const char *Name, LLVMValueRef F) {
-  return LLVMBuildLandingPad(B, Ty, PersFn, NumClauses, Name);
-}
-
 extern "C" LLVMValueRef LLVMRustBuildCleanupPad(LLVMBuilderRef B,
                                                 LLVMValueRef ParentPad,
                                                 unsigned ArgCount,
@@ -1355,10 +1348,6 @@ extern "C" bool LLVMRustConstInt128Get(LLVMValueRef CV, bool sext, uint64_t *hig
     return true;
 }
 
-extern "C" LLVMContextRef LLVMRustGetValueContext(LLVMValueRef V) {
-  return wrap(&unwrap(V)->getContext());
-}
-
 enum class LLVMRustVisibility {
   Default = 0,
   Hidden = 1,
@@ -1439,11 +1428,6 @@ LLVMRustModuleBufferLen(const LLVMRustModuleBuffer *Buffer) {
 
 extern "C" uint64_t
 LLVMRustModuleCost(LLVMModuleRef M) {
-  Module &Mod = *unwrap(M);
-  uint64_t cost = 0;
-  for (auto &F : Mod.functions()) {
-    (void)F;
-    cost += 1;
-  }
-  return cost;
+  auto f = unwrap(M)->functions();
+  return std::distance(std::begin(f), std::end(f));
 }