PassWrapper: adapt for llvm/llvm-project@94122d5

We also have to remove the LLVM argument in cast-target-abi.rs for LLVM
21. I'm not really sure what the best approach here is since that test
already uses revisions. We could also fork the test into a copy for LLVM
19-20 and another for LLVM 21, but what I did for now was drop the
lint-abort-on-error flag to LLVM figuring that some coverage was better
than none, but I'm happy to change this if that was a bad direction.

The above also applies for ffi-out-of-bounds-loads.rs.

r? dianqk
@rustbot label llvm-main

Author: durin42

Diff for: compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -857,7 +857,11 @@ extern "C" LLVMRustResult LLVMRustOptimize(
   if (LintIR) {
     PipelineStartEPCallbacks.push_back(
         [](ModulePassManager &MPM, OptimizationLevel Level) {
+#if LLVM_VERSION_GE(21, 0)
+          MPM.addPass(createModuleToFunctionPassAdaptor(LintPass(/*AbortOnError=*/true)));
+#else
           MPM.addPass(createModuleToFunctionPassAdaptor(LintPass()));
+#endif
         });
   }
 

Diff for: tests/codegen/cast-target-abi.rs

@@ -2,7 +2,7 @@
 //@ add-core-stubs
 //@ revisions:aarch64 loongarch64 powerpc64 sparc64 x86_64
 //@ min-llvm-version: 19
-//@ compile-flags: -Copt-level=3 -Cno-prepopulate-passes -Zlint-llvm-ir -Cllvm-args=-lint-abort-on-error
+//@ compile-flags: -Copt-level=3 -Cno-prepopulate-passes -Zlint-llvm-ir
 
 //@[aarch64] compile-flags: --target aarch64-unknown-linux-gnu
 //@[aarch64] needs-llvm-components: arm

Diff for: tests/codegen/cffi/ffi-out-of-bounds-loads.rs

@@ -1,7 +1,7 @@
 //@ add-core-stubs
 //@ revisions: linux apple
 //@ min-llvm-version: 19
-//@ compile-flags: -Copt-level=0 -Cno-prepopulate-passes -Zlint-llvm-ir -Cllvm-args=-lint-abort-on-error
+//@ compile-flags: -Copt-level=0 -Cno-prepopulate-passes -Zlint-llvm-ir
 
 //@[linux] compile-flags: --target x86_64-unknown-linux-gnu
 //@[linux] needs-llvm-components: x86