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Diffstat (limited to '')
-rw-r--r-- | src/test/codegen/slice-iter-len-eq-zero.rs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/codegen/slice-iter-len-eq-zero.rs b/src/test/codegen/slice-iter-len-eq-zero.rs index fd19e624c..112402825 100644 --- a/src/test/codegen/slice-iter-len-eq-zero.rs +++ b/src/test/codegen/slice-iter-len-eq-zero.rs @@ -1,5 +1,6 @@ // no-system-llvm // compile-flags: -O +// ignore-debug: the debug assertions add extra comparisons #![crate_type = "lib"] type Demo = [u8; 3]; @@ -12,3 +13,16 @@ pub fn slice_iter_len_eq_zero(y: std::slice::Iter<'_, Demo>) -> bool { // CHECK: ret i1 %2 y.len() == 0 } + +// CHECK-LABEL: @array_into_iter_len_eq_zero +#[no_mangle] +pub fn array_into_iter_len_eq_zero(y: std::array::IntoIter<Demo, 123>) -> bool { + // This should be able to just check that the indexes are equal, and not + // need any subtractions or comparisons to handle `start > end`. + + // CHECK-NOT: icmp + // CHECK-NOT: sub + // CHECK: %1 = icmp eq {{i16|i32|i64}} + // CHECK: ret i1 %1 + y.len() == 0 +} |