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Folkert de Vries
29 lines
781 B
Rust
29 lines
781 B
Rust
//@ assembly-output: emit-asm
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//@ compile-flags: -Copt-level=3
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//@ only-arm
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//@ ignore-thumb
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//@ ignore-android
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#![no_std]
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#![crate_type = "lib"]
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#![feature(c_variadic)]
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// Check that the assembly that rustc generates matches what clang emits. This example in particular
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// is related to https://github.com/rust-lang/rust/pull/144549 and shows the effect of us correctly
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// emitting annotations that start and end the lifetime of the va_list.
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#[unsafe(no_mangle)]
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unsafe extern "C" fn variadic(a: f64, mut args: ...) -> f64 {
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// CHECK-LABEL: variadic
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// CHECK: sub sp, sp
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// CHECK: vldr
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// CHECK: vadd.f64
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// CHECK: vldr
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// CHECK: vadd.f64
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let b = args.next_arg::<f64>();
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let c = args.next_arg::<f64>();
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a + b + c
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// CHECK: add sp, sp
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}
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