Renjisann/add tests

compiler/rustc_codegen_gcc/src/builder.rs

@@ -25,7 +25,7 @@ use rustc_middle::ty::layout::{
     FnAbiError, FnAbiOfHelpers, FnAbiRequest, HasParamEnv, HasTyCtxt, LayoutError, LayoutOfHelpers,
     TyAndLayout,
 };
-use rustc_middle::ty::{ParamEnv, Ty, TyCtxt, Instance};
+use rustc_middle::ty::{Instance, ParamEnv, Ty, TyCtxt};
 use rustc_span::def_id::DefId;
 use rustc_span::Span;
 use rustc_target::abi::{
@@ -1736,6 +1736,41 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
     ) {
         unimplemented!();
     }
+
+    fn mcdc_parameters(
+        &mut self,
+        _fn_name: Self::Value,
+        _hash: Self::Value,
+        _bitmap_bytes: Self::Value,
+    ) -> Self::Value {
+        unimplemented!();
+    }
+
+    fn mcdc_tvbitmap_update(
+        &mut self,
+        _fn_name: Self::Value,
+        _hash: Self::Value,
+        _bitmap_bytes: Self::Value,
+        _bitmap_index: Self::Value,
+        _mcdc_temp: Self::Value,
+    ) {
+        unimplemented!();
+    }
+
+    fn mcdc_condbitmap_update(
+        &mut self,
+        _fn_name: Self::Value,
+        _hash: Self::Value,
+        _cond_loc: Self::Value,
+        _mcdc_temp: Self::Value,
+        _bool_value: Self::Value,
+    ) {
+        unimplemented!();
+    }
+
+    fn mcdc_condbitmap_reset(&mut self, _mcdc_temp: Self::Value) {
+        unimplemented!();
+    }
 }
 
 impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {

compiler/rustc_codegen_llvm/src/builder.rs

@@ -17,7 +17,7 @@ use rustc_data_structures::small_c_str::SmallCStr;
 use rustc_hir::def_id::DefId;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrs;
 use rustc_middle::ty::layout::{
-    FnAbiError, FnAbiOfHelpers, FnAbiRequest, LayoutError, LayoutOfHelpers, TyAndLayout,
+    FnAbiError, FnAbiOfHelpers, FnAbiRequest, HasTyCtxt, LayoutError, LayoutOfHelpers, TyAndLayout,
 };
 use rustc_middle::ty::{self, Instance, Ty, TyCtxt};
 use rustc_session::config::OptLevel;
@@ -1238,6 +1238,133 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         }
     }
 
+    fn mcdc_parameters(
+        &mut self,
+        fn_name: Self::Value,
+        hash: Self::Value,
+        bitmap_bytes: Self::Value,
+    ) -> &'ll Value {
+        debug!("mcdc_parameters() with args ({:?}, {:?}, {:?})", fn_name, hash, bitmap_bytes);
+
+        assert!(llvm_util::get_version() >= (18, 0, 0), "MCDC intrinsics require LLVM 18 or later");
+
+        let llfn = unsafe { llvm::LLVMRustGetInstrProfMCDCParametersIntrinsic(self.cx().llmod) };
+        let llty = self.cx.type_func(
+            &[self.cx.type_ptr(), self.cx.type_i64(), self.cx.type_i32()],
+            self.cx.type_void(),
+        );
+        let args = &[fn_name, hash, bitmap_bytes];
+        let args = self.check_call("call", llty, llfn, args);
+
+        unsafe {
+            let _ = llvm::LLVMRustBuildCall(
+                self.llbuilder,
+                llty,
+                llfn,
+                args.as_ptr() as *const &llvm::Value,
+                args.len() as c_uint,
+                [].as_ptr(),
+                0 as c_uint,
+            );
+            // Create condition bitmap named `mcdc.addr`.
+            let mut bx = Builder::with_cx(self.cx);
+            bx.position_at_start(llvm::LLVMGetFirstBasicBlock(self.llfn()));
+            let cond_bitmap = {
+                let alloca =
+                    llvm::LLVMBuildAlloca(bx.llbuilder, bx.cx.type_i32(), c"mcdc.addr".as_ptr());
+                llvm::LLVMSetAlignment(alloca, 4);
+                alloca
+            };
+            bx.store(self.const_i32(0), cond_bitmap, self.tcx().data_layout.i32_align.abi);
+            cond_bitmap
+        }
+    }
+
+    fn mcdc_tvbitmap_update(
+        &mut self,
+        fn_name: Self::Value,
+        hash: Self::Value,
+        bitmap_bytes: Self::Value,
+        bitmap_index: Self::Value,
+        mcdc_temp: Self::Value,
+    ) {
+        debug!(
+            "mcdc_tvbitmap_update() with args ({:?}, {:?}, {:?}, {:?}, {:?})",
+            fn_name, hash, bitmap_bytes, bitmap_index, mcdc_temp
+        );
+        assert!(llvm_util::get_version() >= (18, 0, 0), "MCDC intrinsics require LLVM 18 or later");
+
+        let llfn =
+            unsafe { llvm::LLVMRustGetInstrProfMCDCTVBitmapUpdateIntrinsic(self.cx().llmod) };
+        let llty = self.cx.type_func(
+            &[
+                self.cx.type_ptr(),
+                self.cx.type_i64(),
+                self.cx.type_i32(),
+                self.cx.type_i32(),
+                self.cx.type_ptr(),
+            ],
+            self.cx.type_void(),
+        );
+        let args = &[fn_name, hash, bitmap_bytes, bitmap_index, mcdc_temp];
+        let args = self.check_call("call", llty, llfn, args);
+        unsafe {
+            let _ = llvm::LLVMRustBuildCall(
+                self.llbuilder,
+                llty,
+                llfn,
+                args.as_ptr() as *const &llvm::Value,
+                args.len() as c_uint,
+                [].as_ptr(),
+                0 as c_uint,
+            );
+        }
+    }
+
+    fn mcdc_condbitmap_update(
+        &mut self,
+        fn_name: Self::Value,
+        hash: Self::Value,
+        cond_loc: Self::Value,
+        mcdc_temp: Self::Value,
+        bool_value: Self::Value,
+    ) {
+        debug!(
+            "mcdc_condbitmap_update() with args ({:?}, {:?}, {:?}, {:?}, {:?})",
+            fn_name, hash, cond_loc, mcdc_temp, bool_value
+        );
+        assert!(llvm_util::get_version() >= (18, 0, 0), "MCDC intrinsics require LLVM 18 or later");
+        let llfn = unsafe { llvm::LLVMRustGetInstrProfMCDCCondBitmapIntrinsic(self.cx().llmod) };
+        let llty = self.cx.type_func(
+            &[
+                self.cx.type_ptr(),
+                self.cx.type_i64(),
+                self.cx.type_i32(),
+                self.cx.type_ptr(),
+                self.cx.type_i1(),
+            ],
+            self.cx.type_void(),
+        );
+        let args = &[fn_name, hash, cond_loc, mcdc_temp, bool_value];
+        self.check_call("call", llty, llfn, args);
+        unsafe {
+            let _ = llvm::LLVMRustBuildCall(
+                self.llbuilder,
+                llty,
+                llfn,
+                args.as_ptr() as *const &llvm::Value,
+                args.len() as c_uint,
+                [].as_ptr(),
+                0 as c_uint,
+            );
+        }
+    }
+
+    fn mcdc_condbitmap_reset(&mut self, mcdc_temp: Self::Value) {
+        let i32_align = self.tcx().data_layout.i32_align.abi;
+        self.store(self.const_i32(0), mcdc_temp, i32_align);
+    }
+
     fn call(
         &mut self,
         llty: &'ll Type,