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Treat undef bytes as equal to any other byte

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This commit is contained in:
Oli Scherer 2025-01-08 15:00:25 +00:00
parent 964c58a7d9
commit dfa4c01b2e
6 changed files with 40 additions and 7 deletions
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4
compiler/rustc_codegen_llvm/src/common.rs
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@ -126,6 +126,10 @@ impl<'ll, 'tcx> ConstCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
unsafe { llvm::LLVMGetUndef(t) }
}
fn is_undef(&self, v: &'ll Value) -> bool {
unsafe { llvm::LLVMIsUndef(v) == True }
}
fn const_poison(&self, t: &'ll Type) -> &'ll Value {
unsafe { llvm::LLVMGetPoison(t) }
}

1
compiler/rustc_codegen_llvm/src/llvm/ffi.rs
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@ -918,6 +918,7 @@ unsafe extern "C" {
pub fn LLVMMetadataTypeInContext(C: &Context) -> &Type;
// Operations on all values
pub fn LLVMIsUndef(Val: &Value) -> Bool;
pub fn LLVMTypeOf(Val: &Value) -> &Type;
pub fn LLVMGetValueName2(Val: &Value, Length: *mut size_t) -> *const c_char;
pub fn LLVMSetValueName2(Val: &Value, Name: *const c_char, NameLen: size_t);