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add inline attribute and codegen test

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edwloef 2025-01-28 12:26:32 +01:00
parent 311c3b71f0
commit fb3d1d0c4b
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tests/codegen/lib-optimizations/slice_rotate.rs Normal file
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//@ compile-flags: -O
#![crate_type = "lib"]
// Ensure that the simple case of rotating by a constant 1 optimizes to the obvious thing
// CHECK-LABEL: @rotate_left_by_one
#[no_mangle]
pub fn rotate_left_by_one(slice: &mut [i32]) {
// CHECK-NOT: phi
// CHECK-NOT: call
// CHECK-NOT: load
// CHECK-NOT: store
// CHECK-NOT: getelementptr
// CHECK: %[[END:.+]] = getelementptr
// CHECK-NEXT: %[[DIM:.+]] = getelementptr
// CHECK-NEXT: %[[LAST:.+]] = load
// CHECK-NEXT: %[[FIRST:.+]] = shl
// CHECK-NEXT: call void @llvm.memmove
// CHECK-NEXT: store i32 %[[LAST]], ptr %[[DIM:.+]]
// CHECK-NOT: phi
// CHECK-NOT: call
// CHECK-NOT: load
// CHECK-NOT: store
// CHECK-NOT: getelementptr
// CHECK: ret void
if !slice.is_empty() {
slice.rotate_left(1);
}
}