diff --git a/scripts/test_rustc_tests.sh b/scripts/test_rustc_tests.sh
index ca07c59c3925..81e287f1ddeb 100755
--- a/scripts/test_rustc_tests.sh
+++ b/scripts/test_rustc_tests.sh
@@ -10,103 +10,103 @@ pushd rust
 
 command -v rg >/dev/null 2>&1 || cargo install ripgrep
 
-rm -r src/test/ui/{extern/,unsized-locals/,lto/,linkage*} || true
-for test in $(rg --files-with-matches "lto|// needs-asm-support|// needs-unwind" src/test/{codegen-units,ui,incremental}); do
+rm -r tests/ui/{extern/,unsized-locals/,lto/,linkage*} || true
+for test in $(rg --files-with-matches "lto|// needs-asm-support|// needs-unwind" tests/{codegen-units,ui,incremental}); do
   rm $test
 done
 
-for test in $(rg -i --files-with-matches "//(\[\w+\])?~[^\|]*\s*ERR|// error-pattern:|// build-fail|// run-fail|-Cllvm-args" src/test/ui); do
+for test in $(rg -i --files-with-matches "//(\[\w+\])?~[^\|]*\s*ERR|// error-pattern:|// build-fail|// run-fail|-Cllvm-args" tests/ui); do
   rm $test
 done
 
-git checkout -- src/test/ui/issues/auxiliary/issue-3136-a.rs # contains //~ERROR, but shouldn't be removed
-git checkout -- src/test/ui/proc-macro/pretty-print-hack/
+git checkout -- tests/ui/issues/auxiliary/issue-3136-a.rs # contains //~ERROR, but shouldn't be removed
+git checkout -- tests/ui/proc-macro/pretty-print-hack/
 
 # missing features
 # ================
 
 # requires stack unwinding
-rm src/test/incremental/change_crate_dep_kind.rs
-rm src/test/incremental/issue-80691-bad-eval-cache.rs # -Cpanic=abort causes abort instead of exit(101)
+rm tests/incremental/change_crate_dep_kind.rs
+rm tests/incremental/issue-80691-bad-eval-cache.rs # -Cpanic=abort causes abort instead of exit(101)
 
 # requires compiling with -Cpanic=unwind
-rm -r src/test/ui/macros/rfc-2011-nicer-assert-messages/
-rm -r src/test/run-make/test-benches
-rm src/test/ui/test-attrs/test-type.rs
+rm -r tests/ui/macros/rfc-2011-nicer-assert-messages/
+rm -r tests/run-make/test-benches
+rm tests/ui/test-attrs/test-type.rs
 
 # vendor intrinsics
-rm src/test/ui/sse2.rs # cpuid not supported, so sse2 not detected
-rm src/test/ui/intrinsics/const-eval-select-x86_64.rs # requires x86_64 vendor intrinsics
-rm src/test/ui/simd/array-type.rs # "Index argument for `simd_insert` is not a constant"
-rm src/test/ui/simd/intrinsic/float-math-pass.rs # simd_fcos unimplemented
+rm tests/ui/sse2.rs # cpuid not supported, so sse2 not detected
+rm tests/ui/intrinsics/const-eval-select-x86_64.rs # requires x86_64 vendor intrinsics
+rm tests/ui/simd/array-type.rs # "Index argument for `simd_insert` is not a constant"
+rm tests/ui/simd/intrinsic/float-math-pass.rs # simd_fcos unimplemented
 
 # exotic linkages
-rm src/test/ui/issues/issue-33992.rs # unsupported linkages
-rm src/test/incremental/hashes/function_interfaces.rs # same
-rm src/test/incremental/hashes/statics.rs # same
+rm tests/ui/issues/issue-33992.rs # unsupported linkages
+rm tests/incremental/hashes/function_interfaces.rs # same
+rm tests/incremental/hashes/statics.rs # same
 
 # variadic arguments
-rm src/test/ui/abi/mir/mir_codegen_calls_variadic.rs # requires float varargs
-rm src/test/ui/abi/variadic-ffi.rs # requires callee side vararg support
+rm tests/ui/abi/mir/mir_codegen_calls_variadic.rs # requires float varargs
+rm tests/ui/abi/variadic-ffi.rs # requires callee side vararg support
 
 # unsized locals
-rm -r src/test/run-pass-valgrind/unsized-locals
+rm -r tests/run-pass-valgrind/unsized-locals
 
 # misc unimplemented things
-rm src/test/ui/intrinsics/intrinsic-nearby.rs # unimplemented nearbyintf32 and nearbyintf64 intrinsics
-rm src/test/ui/target-feature/missing-plusminus.rs # error not implemented
-rm src/test/ui/fn/dyn-fn-alignment.rs # wants a 256 byte alignment
-rm -r src/test/run-make/emit-named-files # requires full --emit support
-rm -r src/test/run-make/repr128-dwarf # debuginfo test
+rm tests/ui/intrinsics/intrinsic-nearby.rs # unimplemented nearbyintf32 and nearbyintf64 intrinsics
+rm tests/ui/target-feature/missing-plusminus.rs # error not implemented
+rm tests/ui/fn/dyn-fn-alignment.rs # wants a 256 byte alignment
+rm -r tests/run-make/emit-named-files # requires full --emit support
+rm -r tests/run-make/repr128-dwarf # debuginfo test
 
 # optimization tests
 # ==================
-rm src/test/ui/codegen/issue-28950.rs # depends on stack size optimizations
-rm src/test/ui/codegen/init-large-type.rs # same
-rm src/test/ui/issues/issue-40883.rs # same
-rm -r src/test/run-make/fmt-write-bloat/ # tests an optimization
+rm tests/ui/codegen/issue-28950.rs # depends on stack size optimizations
+rm tests/ui/codegen/init-large-type.rs # same
+rm tests/ui/issues/issue-40883.rs # same
+rm -r tests/run-make/fmt-write-bloat/ # tests an optimization
 
 # backend specific tests
 # ======================
-rm src/test/incremental/thinlto/cgu_invalidated_when_import_{added,removed}.rs # requires LLVM
-rm src/test/ui/abi/stack-protector.rs # requires stack protector support
+rm tests/incremental/thinlto/cgu_invalidated_when_import_{added,removed}.rs # requires LLVM
+rm tests/ui/abi/stack-protector.rs # requires stack protector support
 
 # giving different but possibly correct results
 # =============================================
-rm src/test/ui/mir/mir_misc_casts.rs # depends on deduplication of constants
-rm src/test/ui/mir/mir_raw_fat_ptr.rs # same
-rm src/test/ui/consts/issue-33537.rs # same
-rm src/test/ui/layout/valid_range_oob.rs # different ICE message
+rm tests/ui/mir/mir_misc_casts.rs # depends on deduplication of constants
+rm tests/ui/mir/mir_raw_fat_ptr.rs # same
+rm tests/ui/consts/issue-33537.rs # same
+rm tests/ui/layout/valid_range_oob.rs # different ICE message
 
 # doesn't work due to the way the rustc test suite is invoked.
 # should work when using ./x.py test the way it is intended
 # ============================================================
-rm -r src/test/run-make/emit-shared-files # requires the rustdoc executable in dist/bin/
-rm -r src/test/run-make/unstable-flag-required # same
-rm -r src/test/run-make/rustdoc-* # same
-rm -r src/test/run-make/issue-88756-default-output # same
-rm -r src/test/run-make/remap-path-prefix-dwarf # requires llvm-dwarfdump
-rm -r src/test/ui/consts/missing_span_in_backtrace.rs # expects sysroot source to be elsewhere
+rm -r tests/run-make/emit-shared-files # requires the rustdoc executable in dist/bin/
+rm -r tests/run-make/unstable-flag-required # same
+rm -r tests/run-make/rustdoc-* # same
+rm -r tests/run-make/issue-88756-default-output # same
+rm -r tests/run-make/remap-path-prefix-dwarf # requires llvm-dwarfdump
+rm -r tests/ui/consts/missing_span_in_backtrace.rs # expects sysroot source to be elsewhere
 
 # genuine bugs
 # ============
-rm src/test/incremental/spike-neg1.rs # errors out for some reason
-rm src/test/incremental/spike-neg2.rs # same
+rm tests/incremental/spike-neg1.rs # errors out for some reason
+rm tests/incremental/spike-neg2.rs # same
 
-rm src/test/ui/simd/intrinsic/generic-reduction-pass.rs # simd_reduce_add_unordered doesn't accept an accumulator for integer vectors
+rm tests/ui/simd/intrinsic/generic-reduction-pass.rs # simd_reduce_add_unordered doesn't accept an accumulator for integer vectors
 
-rm src/test/ui/simd/intrinsic/generic-as.rs # crash when accessing vector type filed (#1318)
-rm src/test/ui/simd/simd-bitmask.rs # crash
+rm tests/ui/simd/intrinsic/generic-as.rs # crash when accessing vector type filed (#1318)
+rm tests/ui/simd/simd-bitmask.rs # crash
 
 # bugs in the test suite
 # ======================
-rm src/test/ui/backtrace.rs # TODO warning
-rm src/test/ui/simple_global_asm.rs # TODO add needs-asm-support
-rm src/test/ui/process/nofile-limit.rs # TODO some AArch64 linking issue
-rm src/test/ui/dyn-star/dispatch-on-pin-mut.rs # TODO failed assertion in vtable::get_ptr_and_method_ref
+rm tests/ui/backtrace.rs # TODO warning
+rm tests/ui/simple_global_asm.rs # TODO add needs-asm-support
+rm tests/ui/process/nofile-limit.rs # TODO some AArch64 linking issue
+rm tests/ui/dyn-star/dispatch-on-pin-mut.rs # TODO failed assertion in vtable::get_ptr_and_method_ref
 
-rm src/test/ui/stdio-is-blocking.rs # really slow with unoptimized libstd
+rm tests/ui/stdio-is-blocking.rs # really slow with unoptimized libstd
 
 echo "[TEST] rustc test suite"
-RUST_TEST_NOCAPTURE=1 COMPILETEST_FORCE_STAGE0=1 ./x.py test --stage 0 src/test/{codegen-units,run-make,run-pass-valgrind,ui,incremental}
+RUST_TEST_NOCAPTURE=1 COMPILETEST_FORCE_STAGE0=1 ./x.py test --stage 0 tests/{codegen-units,run-make,run-pass-valgrind,ui,incremental}
 popd
diff --git a/src/constant.rs b/src/constant.rs
index dee6fb5b5130..51450897bfc1 100644
--- a/src/constant.rs
+++ b/src/constant.rs
@@ -304,7 +304,7 @@ fn data_id_for_static(
 
         // Comment copied from https://github.com/rust-lang/rust/blob/45060c2a66dfd667f88bd8b94261b28a58d85bd5/src/librustc_codegen_llvm/consts.rs#L141
         // Declare an internal global `extern_with_linkage_foo` which
-        // is initialized with the address of `foo`.  If `foo` is
+        // is initialized with the address of `foo`. If `foo` is
         // discarded during linking (for example, if `foo` has weak
         // linkage and there are no definitions), then
         // `extern_with_linkage_foo` will instead be initialized to
diff --git a/src/debuginfo/mod.rs b/src/debuginfo/mod.rs
index 4cb556844b7e..3a7421d8b30d 100644
--- a/src/debuginfo/mod.rs
+++ b/src/debuginfo/mod.rs
@@ -72,7 +72,7 @@ impl DebugContext {
             .working_dir
             .to_string_lossy(FileNameDisplayPreference::Remapped)
             .into_owned();
-        let (name, file_info) = match tcx.sess.local_crate_source_file.clone() {
+        let (name, file_info) = match tcx.sess.local_crate_source_file() {
             Some(path) => {
                 let name = path.to_string_lossy().into_owned();
                 (name, None)
diff --git a/src/intrinsics/mod.rs b/src/intrinsics/mod.rs
index 3681154e7888..9cce8e9b9cdc 100644
--- a/src/intrinsics/mod.rs
+++ b/src/intrinsics/mod.rs
@@ -643,7 +643,7 @@ fn codegen_regular_intrinsic_call<'tcx>(
             let res = CValue::by_val(res, arg.layout());
             ret.write_cvalue(fx, res);
         }
-        sym::assert_inhabited | sym::assert_zero_valid | sym::assert_uninit_valid => {
+        sym::assert_inhabited | sym::assert_zero_valid | sym::assert_mem_uninitialized_valid => {
             intrinsic_args!(fx, args => (); intrinsic);
 
             let layout = fx.layout_of(substs.type_at(0));
@@ -672,7 +672,9 @@ fn codegen_regular_intrinsic_call<'tcx>(
                 return;
             }
 
-            if intrinsic == sym::assert_uninit_valid && !fx.tcx.permits_uninit_init(layout) {
+            if intrinsic == sym::assert_mem_uninitialized_valid
+                && !fx.tcx.permits_uninit_init(layout)
+            {
                 with_no_trimmed_paths!({
                     crate::base::codegen_panic(
                         fx,