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Auto merge of #108012 - compiler-errors:issue-107999, r=oli-obk

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Don't ICE in `might_permit_raw_init` if reference is polymorphic

Emitting optimized MIR for a polymorphic function may require computing layout of a type that isn't (yet) known. This happens in the instcombine pass, for example. Let's fail gracefully in that condition.

cc `@saethlin`
fixes #107999
This commit is contained in:
bors
2023-02-15 20:56:07 +00:00
parent 2d14db321b b096f0e0f0
commit c5283576ec
11 changed files with 116 additions and 56 deletions
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10
compiler/rustc_const_eval/src/interpret/intrinsics.rs
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@@ -448,7 +448,10 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
if intrinsic_name == sym::assert_zero_valid {
let should_panic = !self.tcx.permits_zero_init(self.param_env.and(layout));
let should_panic = !self
.tcx
.permits_zero_init(self.param_env.and(ty))
.map_err(|_| err_inval!(TooGeneric))?;
if should_panic {
M::abort(
@@ -462,7 +465,10 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
}
if intrinsic_name == sym::assert_mem_uninitialized_valid {
let should_panic = !self.tcx.permits_uninit_init(self.param_env.and(layout));
let should_panic = !self
.tcx
.permits_uninit_init(self.param_env.and(ty))
.map_err(|_| err_inval!(TooGeneric))?;
if should_panic {
M::abort(