Nightly Clang Valgrind Failures

[seldridge]

There are a couple of nightly valgrind failures with clang the past couple of nights. See: https://github.com/llvm/circt/actions/runs/22951700485/job/66617724677

Specifically:

1. arcilator/arcilator.mlir:

******************** TEST 'CIRCT :: arcilator/arcilator.mlir' FAILED ********************
Exit Code: 123

Command Output (stderr):
--
/__w/circt/circt/build/bin/arcilator /__w/circt/circt/test/arcilator/arcilator.mlir | /__w/circt/circt/build/bin/FileCheck /__w/circt/circt/test/arcilator/arcilator.mlir --check-prefix=LLVM # RUN: at line 1
+ /__w/circt/circt/build/bin/arcilator /__w/circt/circt/test/arcilator/arcilator.mlir
+ /__w/circt/circt/build/bin/FileCheck /__w/circt/circt/test/arcilator/arcilator.mlir --check-prefix=LLVM
==30723== Conditional jump or move depends on uninitialised value(s)
==30723==    at 0x497E8CD: (anonymous namespace)::AssemblyWriter::printFunction(llvm::Function const*) (in /__w/circt/circt/build/bin/arcilator)
==30723==    by 0x4981986: llvm::Module::print(llvm::raw_ostream&, llvm::AssemblyAnnotationWriter*, bool, bool) const (in /__w/circt/circt/build/bin/arcilator)
==30723==    by 0x18B5431: processBuffer(mlir::MLIRContext&, mlir::TimingScope&, llvm::SourceMgr&, std::optional<std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile> > >&) (in /__w/circt/circt/build/bin/arcilator)
==30723==    by 0x18B3E73: processInputSplit(mlir::MLIRContext&, mlir::TimingScope&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer> >, std::optional<std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile> > >&) (in /__w/circt/circt/build/bin/arcilator)
==30723==    by 0x18B127F: executeArcilator(mlir::MLIRContext&) (in /__w/circt/circt/build/bin/arcilator)
==30723==    by 0x18B087B: main (in /__w/circt/circt/build/bin/arcilator)
==30723== 

--

********************

2. arcilator/compreg.mlir

******************** TEST 'CIRCT :: arcilator/compreg.mlir' FAILED ********************
Exit Code: 123

Command Output (stdout):
--
; ModuleID = 'LLVMDialectModule'
source_filename = "LLVMDialectModule"

@_arc_mod_name_arbitrary_reset_value = internal constant [22 x i8] c"arbitrary_reset_value\00"
@arcRuntimeModel_arbitrary_reset_value = global { i64, i64, ptr, ptr } { i64 1, i64 32, ptr @_arc_mod_name_arbitrary_reset_value, ptr null }

declare void @exit(i32)

define void @arbitrary_reset_value_eval(ptr %0) {
  %2 = getelementptr i8, ptr %0, i32 12
  %3 = load i1, ptr %2, align 1
  %4 = getelementptr i8, ptr %0, i32 20
  %5 = load i1, ptr %4, align 1
  store i1 %3, ptr %4, align 1
  %6 = xor i1 %5, %3
  %7 = and i1 %6, %3
  br i1 %7, label %8, label %17

8:                                                ; preds = %1
  %9 = getelementptr i8, ptr %0, i32 13
  %10 = load i1, ptr %9, align 1
  %11 = getelementptr i8, ptr %0, i32 16
  %12 = load i32, ptr %11, align 4
  %13 = getelementptr i8, ptr %0, i32 8
  %14 = load i32, ptr %13, align 4
  %15 = select i1 %10, i32 %12, i32 %14
  %16 = getelementptr i8, ptr %0, i32 24
  store i32 %15, ptr %16, align 4
  br label %17

17:                                               ; preds = %8, %1
  %18 = getelementptr i8, ptr %0, i32 24
  %19 = load i32, ptr %18, align 4
  %20 = getelementptr i8, ptr %0, i32 28
  store i32 %19, ptr %20, align 4
  ret void
}

!llvm.module.flags = !{!0}

!0 = !{i32 2, !"Debug Info Version", i32 3}

--
Command Output (stderr):
--
/__w/circt/circt/build/bin/arcilator /__w/circt/circt/test/arcilator/compreg.mlir # RUN: at line 1
+ /__w/circt/circt/build/bin/arcilator /__w/circt/circt/test/arcilator/compreg.mlir
==30727== Conditional jump or move depends on uninitialised value(s)
==30727==    at 0x497E8CD: (anonymous namespace)::AssemblyWriter::printFunction(llvm::Function const*) (in /__w/circt/circt/build/bin/arcilator)
==30727==    by 0x4981986: llvm::Module::print(llvm::raw_ostream&, llvm::AssemblyAnnotationWriter*, bool, bool) const (in /__w/circt/circt/build/bin/arcilator)
==30727==    by 0x18B5431: processBuffer(mlir::MLIRContext&, mlir::TimingScope&, llvm::SourceMgr&, std::optional<std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile> > >&) (in /__w/circt/circt/build/bin/arcilator)
==30727==    by 0x18B3E73: processInputSplit(mlir::MLIRContext&, mlir::TimingScope&, std::unique_ptr<llvm::MemoryBuffer, std::default_delete<llvm::MemoryBuffer> >, std::optional<std::unique_ptr<llvm::ToolOutputFile, std::default_delete<llvm::ToolOutputFile> > >&) (in /__w/circt/circt/build/bin/arcilator)
==30727==    by 0x18B127F: executeArcilator(mlir::MLIRContext&) (in /__w/circt/circt/build/bin/arcilator)
==30727==    by 0x18B087B: main (in /__w/circt/circt/build/bin/arcilator)
==30727== 

--

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