diff options
Diffstat (limited to 'src/test/codegen/layout-size-checks.rs')
-rw-r--r-- | src/test/codegen/layout-size-checks.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/codegen/layout-size-checks.rs b/src/test/codegen/layout-size-checks.rs new file mode 100644 index 000000000..d067cc10a --- /dev/null +++ b/src/test/codegen/layout-size-checks.rs @@ -0,0 +1,31 @@ +// compile-flags: -O +// only-x86_64 +// ignore-debug: the debug assertions get in the way + +#![crate_type = "lib"] + +use std::alloc::Layout; + +type RGB48 = [u16; 3]; + +// CHECK-LABEL: @layout_array_rgb48 +#[no_mangle] +pub fn layout_array_rgb48(n: usize) -> Layout { + // CHECK-NOT: llvm.umul.with.overflow.i64 + // CHECK: icmp ugt i64 %n, 1537228672809129301 + // CHECK-NOT: llvm.umul.with.overflow.i64 + // CHECK: mul nuw nsw i64 %n, 6 + // CHECK-NOT: llvm.umul.with.overflow.i64 + Layout::array::<RGB48>(n).unwrap() +} + +// CHECK-LABEL: @layout_array_i32 +#[no_mangle] +pub fn layout_array_i32(n: usize) -> Layout { + // CHECK-NOT: llvm.umul.with.overflow.i64 + // CHECK: icmp ugt i64 %n, 2305843009213693951 + // CHECK-NOT: llvm.umul.with.overflow.i64 + // CHECK: shl nuw nsw i64 %n, 2 + // CHECK-NOT: llvm.umul.with.overflow.i64 + Layout::array::<i32>(n).unwrap() +} |