mirror of https://github.com/rust-lang/rust
31 lines
833 B
Rust
31 lines
833 B
Rust
//@ compile-flags: -O
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//@ only-x86_64
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#![crate_type = "lib"]
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use std::alloc::Layout;
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type RGB48 = [u16; 3];
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// CHECK-LABEL: @layout_array_rgb48
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#[no_mangle]
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pub fn layout_array_rgb48(n: usize) -> Layout {
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// CHECK-NOT: llvm.umul.with.overflow.i64
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// CHECK: icmp ugt i64 %n, 1537228672809129301
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// CHECK-NOT: llvm.umul.with.overflow.i64
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// CHECK: mul nuw nsw i64 %n, 6
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// CHECK-NOT: llvm.umul.with.overflow.i64
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Layout::array::<RGB48>(n).unwrap()
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}
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// CHECK-LABEL: @layout_array_i32
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#[no_mangle]
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pub fn layout_array_i32(n: usize) -> Layout {
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// CHECK-NOT: llvm.umul.with.overflow.i64
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// CHECK: icmp ugt i64 %n, 2305843009213693951
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// CHECK-NOT: llvm.umul.with.overflow.i64
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// CHECK: shl nuw nsw i64 %n, 2
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// CHECK-NOT: llvm.umul.with.overflow.i64
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Layout::array::<i32>(n).unwrap()
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}
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