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14 lines
427 B
Rust
14 lines
427 B
Rust
// Verify that optimized MIR only copies `a` once.
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//@ compile-flags: -O -C no-prepopulate-passes
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#![crate_type = "lib"]
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type T = [u8; 256];
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#[no_mangle]
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pub fn f(a: T, b: fn(_: T, _: T)) {
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// CHECK: call void @llvm.memcpy.{{.*}}(ptr align 1 %{{.*}}, ptr align 1 %{{.*}}, {{.*}} 256, i1 false)
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// CHECK-NOT: call void @llvm.memcpy.{{.*}}(ptr align 1 %{{.*}}, ptr align 1 %{{.*}}, {{.*}} 256, i1 false)
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b(a, a)
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}
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