mirror of https://github.com/rust-lang/rust
47 lines
1.8 KiB
Rust
47 lines
1.8 KiB
Rust
//@ compile-flags: -g -Zmir-opt-level=0 -Zmir-enable-passes=+ScalarReplacementOfAggregates
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//@ compile-flags: -Cno-prepopulate-passes
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//
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// Tested offsets are only correct for x86_64.
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//@ only-x86_64
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#![crate_type = "lib"]
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pub struct ExtraSlice<'input> {
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slice: &'input [u8],
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extra: u32,
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}
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#[no_mangle]
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pub fn extra(s: &[u8]) {
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// CHECK: void @extra(
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// CHECK: %slice.dbg.spill1 = alloca [4 x i8],
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// CHECK: %slice.dbg.spill = alloca [16 x i8],
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// CHECK: %s.dbg.spill = alloca [16 x i8],
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// CHECK: dbg{{.}}declare({{(metadata )?}}ptr %s.dbg.spill, {{(metadata )?}}![[S_EXTRA:.*]], {{(metadata )?}}!DIExpression()
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// CHECK: dbg{{.}}declare({{(metadata )?}}ptr %slice.dbg.spill, {{(metadata )?}}![[SLICE_EXTRA:.*]], {{(metadata )?}}!DIExpression(DW_OP_LLVM_fragment, 0, 128)
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// CHECK: dbg{{.}}declare({{(metadata )?}}ptr %slice.dbg.spill1, {{(metadata )?}}![[SLICE_EXTRA]], {{(metadata )?}}!DIExpression(DW_OP_LLVM_fragment, 128, 32)
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let slice = ExtraSlice { slice: s, extra: s.len() as u32 };
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}
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struct Zst;
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pub struct ZstSlice<'input> {
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slice: &'input [u8],
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extra: Zst,
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}
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#[no_mangle]
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pub fn zst(s: &[u8]) {
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// The field `extra` is a ZST. The fragment for the field `slice` encompasses the whole
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// variable, so is not a fragment. In that case, the variable must have no fragment.
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// CHECK: void @zst(
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// CHECK-NOT: dbg{{.}}declare({{(metadata )?}}ptr %slice.dbg.spill, {{(metadata )?}}!{}, {{(metadata )?}}!DIExpression(DW_OP_LLVM_fragment,
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// CHECK: dbg{{.}}declare({{(metadata )?}}ptr %{{.*}}, {{(metadata )?}}![[SLICE_ZST:.*]], {{(metadata )?}}!DIExpression()
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// CHECK-NOT: dbg{{.}}declare({{(metadata )?}}ptr %{{.*}}, {{(metadata )?}}![[SLICE_ZST]],
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let slice = ZstSlice { slice: s, extra: Zst };
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}
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// CHECK: ![[S_EXTRA]] = !DILocalVariable(name: "s",
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// CHECK: ![[SLICE_EXTRA]] = !DILocalVariable(name: "slice",
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