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Rollup merge of #105033 - durin42:llvm-16-dont-tail-call-me-bro, r=tmandry

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sparc-struct-abi: work around new tail-call optimization

Upstream LLVM change https://reviews.llvm.org/D138741 introduced some new tail-call smarts for SPARC which broke some of the checks in this test. Rather than adjust the test expectations, we add an extra no-args function that can get tail-called or not without hurting the needs of the test.

r? ``@nikic``
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Matthias Krüger 2022-12-02 21:22:47 +01:00 committed by GitHub
commit 0724a01b8c
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src/test/assembly/sparc-struct-abi.rs
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@ -44,12 +44,16 @@ pub unsafe extern "C" fn callee(arg: Franta) {
tst_use(arg.b);
tst_use(arg.c);
tst_use(arg.d);
tail_call_avoidance_fn();
}
extern "C" {
fn opaque_callee(arg: Franta, intarg: i32);
fn tst_use(arg: f32);
fn clobber();
// This exists so that post-https://reviews.llvm.org/D138741 LLVM doesn't
// tail-call away some of our assertions.
fn tail_call_avoidance_fn();
}
#[no_mangle]
@ -62,4 +66,5 @@ pub unsafe extern "C" fn caller() {
// CHECK: call opaque_callee
// CHECK: mov 3, %o2
opaque_callee(Franta { a: 1.0, b: 2.0, c: 3.0, d: 4.0 }, 3);
tail_call_avoidance_fn();
}