pub fn frame_pointer_type_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
let mut fp = cx.sess().target.frame_pointer;
+ let opts = &cx.sess().opts;
// "mcount" function relies on stack pointer.
// See <https://sourceware.org/binutils/docs/gprof/Implementation.html>.
- if cx.sess().instrument_mcount() || matches!(cx.sess().opts.cg.force_frame_pointers, Some(true))
- {
+ if opts.unstable_opts.instrument_mcount || matches!(opts.cg.force_frame_pointers, Some(true)) {
fp = FramePointer::Always;
}
let attr_value = match fp {
/// Tell LLVM what instrument function to insert.
#[inline]
fn instrument_function_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
- if cx.sess().instrument_mcount() {
+ if cx.sess().opts.unstable_opts.instrument_mcount {
// Similar to `clang -pg` behavior. Handled by the
// `post-inline-ee-instrument` LLVM pass.
}
}
+fn nojumptables_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
+ if !cx.sess().opts.unstable_opts.no_jump_tables {
+ return None;
+ }
+
+ Some(llvm::CreateAttrStringValue(cx.llcx, "no-jump-tables", "true"))
+}
+
fn probestack_attr<'ll>(cx: &CodegenCx<'ll, '_>) -> Option<&'ll Attribute> {
// Currently stack probes seem somewhat incompatible with the address
// sanitizer and thread sanitizer. With asan we're already protected from
// FIXME: none of these three functions interact with source level attributes.
to_add.extend(frame_pointer_type_attr(cx));
to_add.extend(instrument_function_attr(cx));
+ to_add.extend(nojumptables_attr(cx));
to_add.extend(probestack_attr(cx));
to_add.extend(stackprotector_attr(cx));