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//@ ignore-std-debug-assertions
//@ compile-flags: -Copt-level=3 -C no-prepopulate-passes
#![crate_type = "lib"]
// Ensure that MIR optimizations have cleaned things up enough that the IR we
// emit is good even without running the LLVM optimizations.
// CHECK-NOT: define
// CHECK-LABEL: define{{.+}}void @call_for_zero_to_n
#[no_mangle]
pub fn call_for_zero_to_n(n: u32, f: fn(u32)) {
// CHECK: start:
// CHECK-NOT: alloca
// CHECK: %[[IND:.+]] = alloca [4 x i8]
// CHECK-NEXT: %[[ALWAYS_SOME_OPTION:.+]] = alloca
// CHECK-NOT: alloca
// CHECK: store i32 0, ptr %[[IND]],
// CHECK: br label %[[HEAD:.+]]
// CHECK: [[HEAD]]:
// CHECK: %[[T1:.+]] = load i32, ptr %[[IND]],
// CHECK: %[[NOT_DONE:.+]] = icmp ult i32 %[[T1]], %n
// CHECK: br i1 %[[NOT_DONE]], label %[[BODY:.+]], label %[[BREAK:.+]]
// CHECK: [[BREAK]]:
// CHECK: ret void
// CHECK: [[BODY]]:
// CHECK: %[[T2:.+]] = load i32, ptr %[[IND]],
// CHECK: %[[T3:.+]] = add nuw i32 %[[T2]], 1
// CHECK: store i32 %[[T3]], ptr %[[IND]],
// CHECK: store i32 %[[T2]]
// CHECK: %[[T4:.+]] = load i32
// CHECK: call void %f(i32{{.+}}%[[T4]])
for i in 0..n {
f(i);
}
}
// CHECK-NOT: define
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