2304c25f31
LLVM 7 is over a year old, which should be plenty for compatibility. The last LLVM 6 holdout was llvm-emscripten, which went away in #65501. I've also included a fix for LLVM 8 lacking `MemorySanitizerOptions`, which was broken by #66522.
39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
// compile-flags: -C no-prepopulate-passes
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// ignore-tidy-linelength
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#![crate_type = "lib"]
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pub struct Bytes {
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a: u8,
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b: u8,
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c: u8,
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d: u8,
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}
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// CHECK-LABEL: small_array_alignment
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// The array is stored as i32, but its alignment is lower, go with 1 byte to avoid target
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// dependent alignment
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#[no_mangle]
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pub fn small_array_alignment(x: &mut [i8; 4], y: [i8; 4]) {
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// CHECK: [[TMP:%.+]] = alloca i32
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// CHECK: %y = alloca [4 x i8]
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// CHECK: store i32 %0, i32* [[TMP]]
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// CHECK: [[Y8:%[0-9]+]] = bitcast [4 x i8]* %y to i8*
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// CHECK: [[TMP8:%[0-9]+]] = bitcast i32* [[TMP]] to i8*
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// CHECK: call void @llvm.memcpy.{{.*}}(i8* align 1 [[Y8]], i8* align 4 [[TMP8]], i{{[0-9]+}} 4, i1 false)
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*x = y;
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}
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// CHECK-LABEL: small_struct_alignment
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// The struct is stored as i32, but its alignment is lower, go with 1 byte to avoid target
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// dependent alignment
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#[no_mangle]
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pub fn small_struct_alignment(x: &mut Bytes, y: Bytes) {
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// CHECK: [[TMP:%.+]] = alloca i32
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// CHECK: %y = alloca %Bytes
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// CHECK: store i32 %0, i32* [[TMP]]
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// CHECK: [[Y8:%[0-9]+]] = bitcast %Bytes* %y to i8*
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// CHECK: [[TMP8:%[0-9]+]] = bitcast i32* [[TMP]] to i8*
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// CHECK: call void @llvm.memcpy.{{.*}}(i8* align 1 [[Y8]], i8* align 4 [[TMP8]], i{{[0-9]+}} 4, i1 false)
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*x = y;
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}
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