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Rollup merge of #111647 - klensy:cstr, r=oli-obk

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use c literals in compiler and library

Use c literals #108801 in compiler and library

currently blocked on:
* <strike>rustfmt: don't know how to format c literals</strike> nope, nightly one works.
* <strike>bootstrap</strike>

r? `@ghost`
`@rustbot` blocked
This commit is contained in:
Matthias Krüger 2023-06-02 18:12:45 +02:00 • committed by GitHub
commit a3b639ce43
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GPG key ID: 4AEE18F83AFDEB23
23 changed files with 73 additions and 97 deletions
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16
compiler/rustc_codegen_llvm/src/builder.rs
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@ -6,7 +6,6 @@ use crate::llvm::{self, AtomicOrdering, AtomicRmwBinOp, BasicBlock, False, True}
use crate::type_::Type;
use crate::type_of::LayoutLlvmExt;
use crate::value::Value;
use cstr::cstr;
use libc::{c_char, c_uint};
use rustc_codegen_ssa::common::{IntPredicate, RealPredicate, SynchronizationScope, TypeKind};
use rustc_codegen_ssa::mir::operand::{OperandRef, OperandValue};
@ -25,7 +24,6 @@ use rustc_symbol_mangling::typeid::{kcfi_typeid_for_fnabi, typeid_for_fnabi, Typ
use rustc_target::abi::{self, call::FnAbi, Align, Size, WrappingRange};
use rustc_target::spec::{HasTargetSpec, SanitizerSet, Target};
use std::borrow::Cow;
use std::ffi::CStr;
use std::iter;
use std::ops::Deref;
use std::ptr;
@ -45,13 +43,10 @@ impl Drop for Builder<'_, '_, '_> {
}
}
// FIXME(eddyb) use a checked constructor when they become `const fn`.
const EMPTY_C_STR: &CStr = unsafe { CStr::from_bytes_with_nul_unchecked(b"\0") };
/// Empty string, to be used where LLVM expects an instruction name, indicating
/// that the instruction is to be left unnamed (i.e. numbered, in textual IR).
// FIXME(eddyb) pass `&CStr` directly to FFI once it's a thin pointer.
const UNNAMED: *const c_char = EMPTY_C_STR.as_ptr();
const UNNAMED: *const c_char = c"".as_ptr();
impl<'ll, 'tcx> BackendTypes for Builder<'_, 'll, 'tcx> {
type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value;
@ -1010,14 +1005,13 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
}
fn cleanup_pad(&mut self, parent: Option<&'ll Value>, args: &[&'ll Value]) -> Funclet<'ll> {
let name = cstr!("cleanuppad");
let ret = unsafe {
llvm::LLVMBuildCleanupPad(
self.llbuilder,
parent,
args.as_ptr(),
args.len() as c_uint,
name.as_ptr(),
c"cleanuppad".as_ptr(),
)
};
Funclet::new(ret.expect("LLVM does not have support for cleanuppad"))
@ -1031,14 +1025,13 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
}
fn catch_pad(&mut self, parent: &'ll Value, args: &[&'ll Value]) -> Funclet<'ll> {
let name = cstr!("catchpad");
let ret = unsafe {
llvm::LLVMBuildCatchPad(
self.llbuilder,
parent,
args.as_ptr(),
args.len() as c_uint,
name.as_ptr(),
c"catchpad".as_ptr(),
)
};
Funclet::new(ret.expect("LLVM does not have support for catchpad"))
@ -1050,14 +1043,13 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
unwind: Option<&'ll BasicBlock>,
handlers: &[&'ll BasicBlock],
) -> &'ll Value {
let name = cstr!("catchswitch");
let ret = unsafe {
llvm::LLVMBuildCatchSwitch(
self.llbuilder,
parent,
unwind,
handlers.len() as c_uint,
name.as_ptr(),
c"catchswitch".as_ptr(),
)
};
let ret = ret.expect("LLVM does not have support for catchswitch");