Only allow LLVM element_type on Array and Vector

cuviper · cuviper · commit a29239085455 · 2021-08-05T11:06:32.000-07:00
diff --git a/compiler/rustc_codegen_llvm/src/type_.rs b/compiler/rustc_codegen_llvm/src/type_.rs
@@ -203,7 +203,11 @@ impl BaseTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {
     }
 
     fn element_type(&self, ty: &'ll Type) -> &'ll Type {
-        unsafe { llvm::LLVMGetElementType(ty) }
+        match self.type_kind(ty) {
+            TypeKind::Array | TypeKind::Vector => unsafe { llvm::LLVMGetElementType(ty) },
+            TypeKind::Pointer => bug!("element_type is not supported for opaque pointers"),
+            other => bug!("element_type called on unsupported type {:?}", other),
+        }
     }
 
     fn vector_length(&self, ty: &'ll Type) -> usize {

Original file line number	Diff line number	Diff line change
`@@ -203,7 +203,11 @@ impl BaseTypeMethods<'tcx> for CodegenCx<'ll, 'tcx> {`
`203`	`203`	`}`
`204`	`204`
`205`	`205`	`fn element_type(&self, ty: &'ll Type) -> &'ll Type {`
`206`		`- unsafe { llvm::LLVMGetElementType(ty) }`
	`206`	`+ match self.type_kind(ty) {`
	`207`	`+ TypeKind::Array \| TypeKind::Vector => unsafe { llvm::LLVMGetElementType(ty) },`
	`208`	`+ TypeKind::Pointer => bug!("element_type is not supported for opaque pointers"),`
	`209`	`+ other => bug!("element_type called on unsupported type {:?}", other),`
	`210`	`+ }`
`207`	`211`	`}`
`208`	`212`
`209`	`213`	`fn vector_length(&self, ty: &'ll Type) -> usize {`