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All intrinsics are available in all supported LLVM versions

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This commit is contained in:
Jake Goulding 2016-06-10 17:37:46 -04:00
parent 3f36f7a980
commit 448e254ca0
1 changed files with 1 additions and 39 deletions
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40
src/librustc_trans/context.rs
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@ -1097,45 +1097,7 @@ fn declare_intrinsic(ccx: &CrateContext, key: &str) -> Option<ValueRef> {
ifn!("llvm.localrecover", fn(i8p, i8p, t_i32) -> i8p);
ifn!("llvm.x86.seh.recoverfp", fn(i8p, i8p) -> i8p);
// Some intrinsics were introduced in later versions of LLVM, but they have
// fallbacks in libc or libm and such.
macro_rules! compatible_ifn {
($name:expr, noop($cname:ident ($($arg:expr),*) -> void), $llvm_version:expr) => (
if unsafe { llvm::LLVMVersionMinor() >= $llvm_version } {
// The `if key == $name` is already in ifn!
ifn!($name, fn($($arg),*) -> void);
} else if key == $name {
let f = declare::declare_cfn(ccx, stringify!($cname),
Type::func(&[$($arg),*], &void));
llvm::SetLinkage(f, llvm::InternalLinkage);
let bld = ccx.builder();
let llbb = unsafe {
llvm::LLVMAppendBasicBlockInContext(ccx.llcx(), f,
"entry-block\0".as_ptr() as *const _)
};
bld.position_at_end(llbb);
bld.ret_void();
ccx.intrinsics().borrow_mut().insert($name, f.clone());
return Some(f);
}
);
($name:expr, $cname:ident ($($arg:expr),*) -> $ret:expr, $llvm_version:expr) => (
if unsafe { llvm::LLVMVersionMinor() >= $llvm_version } {
// The `if key == $name` is already in ifn!
ifn!($name, fn($($arg),*) -> $ret);
} else if key == $name {
let f = declare::declare_cfn(ccx, stringify!($cname),
Type::func(&[$($arg),*], &$ret));
ccx.intrinsics().borrow_mut().insert($name, f.clone());
return Some(f);
}
)
}
compatible_ifn!("llvm.assume", noop(llvmcompat_assume(i1) -> void), 6);
ifn!("llvm.assume", fn(i1) -> void);
if ccx.sess().opts.debuginfo != NoDebugInfo {
ifn!("llvm.dbg.declare", fn(Type::metadata(ccx), Type::metadata(ccx)) -> void);