bjoernager/rust
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coverageinfo query needs to use the same MIR as codegen

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I ran into an error trying to fix dead block coverage and realized the
`coverageinfo` query is getting a different MIR compared to the
codegenned MIR, which can sometimes be a problem during mapgen.

I changed that query to use the `InstandeDef` (which includes the
generic parameter substitutions, prosibly specific to const params)
instead of the `DefId` (without unknown/default const substitutions).
This commit is contained in:
Rich Kadel 2021-05-11 20:56:23 -07:00
parent 31f523ff94
commit aed8ef5a4d
5 changed files with 8 additions and 19 deletions
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2
compiler/rustc_codegen_ssa/src/mir/coverageinfo.rs
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@ -31,7 +31,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
bx.add_coverage_counter(instance, id, code_region);
}
let coverageinfo = bx.tcx().coverageinfo(instance.def_id());
let coverageinfo = bx.tcx().coverageinfo(instance.def);
let fn_name = bx.get_pgo_func_name_var(instance);
let hash = bx.const_u64(function_source_hash);