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Diffstat (limited to 'tests/codegen/mem-replace-direct-memcpy.rs')
| -rw-r--r-- | tests/codegen/mem-replace-direct-memcpy.rs | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/tests/codegen/mem-replace-direct-memcpy.rs b/tests/codegen/mem-replace-direct-memcpy.rs deleted file mode 100644 index 83babab4f..000000000 --- a/tests/codegen/mem-replace-direct-memcpy.rs +++ /dev/null @@ -1,33 +0,0 @@ -// This test ensures that `mem::replace::<T>` only ever calls `@llvm.memcpy` -// with `size_of::<T>()` as the size, and never goes through any wrapper that -// may e.g. multiply `size_of::<T>()` with a variable "count" (which is only -// known to be `1` after inlining). - -// compile-flags: -C no-prepopulate-passes -Zinline-mir=no -// ignore-debug: the debug assertions get in the way - -#![crate_type = "lib"] - -pub fn replace_byte(dst: &mut u8, src: u8) -> u8 { - std::mem::replace(dst, src) -} - -// NOTE(eddyb) the `CHECK-NOT`s ensure that the only calls of `@llvm.memcpy` in -// the entire output, are the direct calls we want, from `ptr::replace`. - -// CHECK-NOT: call void @llvm.memcpy - -// For a small type, we expect one each of `load`/`store`/`memcpy` instead -// CHECK-LABEL: define internal noundef i8 @{{.+}}mem{{.+}}replace - // CHECK-NOT: alloca - // CHECK: alloca i8 - // CHECK-NOT: alloca - // CHECK-NOT: call void @llvm.memcpy - // CHECK: load i8 - // CHECK-NOT: call void @llvm.memcpy - // CHECK: store i8 - // CHECK-NOT: call void @llvm.memcpy - // CHECK: call void @llvm.memcpy.{{.+}}({{i8\*|ptr}} align 1 %{{.*}}, {{i8\*|ptr}} align 1 %{{.*}}, i{{.*}} 1, i1 false) - // CHECK-NOT: call void @llvm.memcpy - -// CHECK-NOT: call void @llvm.memcpy |