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28 lines
747 B
Rust
28 lines
747 B
Rust
//@ compile-flags: -Cno-prepopulate-passes -Copt-level=0 -Cpanic=abort
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// Check that there's an alloca for the reference and the vector, but nothing else.
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// We use panic=abort because unwinding panics give hint::black_box a cleanup block, which has
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// another alloca.
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#![crate_type = "lib"]
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#[inline(never)]
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fn test<const SIZE: usize>() {
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// CHECK-LABEL: no_alloca_inside_if_false::test
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// CHECK: start:
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// CHECK-NEXT: alloca [{{12|24}} x i8]
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// CHECK-NOT: alloca
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if const { SIZE < 4096 } {
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let arr = [0u8; SIZE];
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std::hint::black_box(&arr);
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} else {
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let vec = vec![0u8; SIZE];
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std::hint::black_box(&vec);
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}
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}
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// CHECK-LABEL: @main
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#[no_mangle]
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pub fn main() {
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test::<8192>();
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}
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