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add codegen test

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This commit is contained in:
Erik Desjardins 2020-08-16 22:02:18 -04:00
parent 68217c9e0f
commit 6fc1d8bc13
1 changed files with 29 additions and 0 deletions
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29
src/test/codegen/zst-offset.rs Normal file
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// compile-flags: -C no-prepopulate-passes
#![crate_type = "lib"]
// Hack to get the correct size for the length part in slices
// CHECK: @helper([[USIZE:i[0-9]+]] %_1)
#[no_mangle]
pub fn helper(_: usize) {
}
// Check that we correctly generate a GEP for a ZST that is not included in Scalar layout
// CHECK-LABEL: @scalar_layout
#[no_mangle]
pub fn scalar_layout(s: &(u64, ())) {
// CHECK: [[X0:%[0-9]+]] = bitcast i64* %s to i8*
// CHECK-NEXT: [[X1:%[0-9]+]] = getelementptr i8, i8* [[X0]], [[USIZE]] 8
let x = &s.1;
&x; // keep variable in an alloca
}
// Check that we correctly generate a GEP for a ZST that is not included in ScalarPair layout
// CHECK-LABEL: @scalarpair_layout
#[no_mangle]
pub fn scalarpair_layout(s: &(u64, u32, ())) {
// CHECK: [[X0:%[0-9]+]] = bitcast { i64, i32 }* %s to i8*
// CHECK-NEXT: [[X1:%[0-9]+]] = getelementptr i8, i8* [[X0]], [[USIZE]] 12
let x = &s.2;
&x; // keep variable in an alloca
}