| // compile-flags: -O -C no-prepopulate-passes |
| // only-x86_64 (to not worry about usize differing) |
| // ignore-debug (the debug assertions get in the way) |
| |
| #![crate_type = "lib"] |
| |
| #[no_mangle] |
| // CHECK-LABEL: @replace_usize( |
| pub fn replace_usize(r: &mut usize, v: usize) -> usize { |
| // CHECK-NOT: alloca |
| // CHECK: %[[R:.+]] = load i64, ptr %r |
| // CHECK: store i64 %v, ptr %r |
| // CHECK: ret i64 %[[R]] |
| std::mem::replace(r, v) |
| } |
| |
| #[no_mangle] |
| // CHECK-LABEL: @replace_ref_str( |
| pub fn replace_ref_str<'a>(r: &mut &'a str, v: &'a str) -> &'a str { |
| // CHECK-NOT: alloca |
| // CHECK: %[[A:.+]] = load ptr |
| // CHECK: %[[B:.+]] = load i64 |
| // CHECK-NOT: store |
| // CHECK-NOT: load |
| // CHECK: store ptr |
| // CHECK: store i64 |
| // CHECK-NOT: load |
| // CHECK-NOT: store |
| // CHECK: %[[P1:.+]] = insertvalue { ptr, i64 } poison, ptr %[[A]], 0 |
| // CHECK: %[[P2:.+]] = insertvalue { ptr, i64 } %[[P1]], i64 %[[B]], 1 |
| // CHECK: ret { ptr, i64 } %[[P2]] |
| std::mem::replace(r, v) |
| } |
| |
| #[no_mangle] |
| // CHECK-LABEL: @replace_short_array_3( |
| pub fn replace_short_array_3(r: &mut [u32; 3], v: [u32; 3]) -> [u32; 3] { |
| // CHECK-NOT: alloca |
| // CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %result, ptr align 4 %r, i64 12, i1 false) |
| // CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %r, ptr align 4 %v, i64 12, i1 false) |
| std::mem::replace(r, v) |
| } |
| |
| #[no_mangle] |
| // CHECK-LABEL: @replace_short_array_4( |
| pub fn replace_short_array_4(r: &mut [u32; 4], v: [u32; 4]) -> [u32; 4] { |
| // CHECK-NOT: alloca |
| // CHECK: %[[R:.+]] = load <4 x i32>, ptr %r, align 4 |
| // CHECK: store <4 x i32> %[[R]], ptr %result |
| // CHECK: %[[V:.+]] = load <4 x i32>, ptr %v, align 4 |
| // CHECK: store <4 x i32> %[[V]], ptr %r |
| std::mem::replace(r, v) |
| } |
