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Monomorphize a type argument of size-of operation during codegen

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This wasn't necessary until MIR inliner started to consider drop glue as
a candidate for inlining; introducing for the first time a generic use
of size-of operation.

No test at this point since this only happens with a custom inlining
threshold.
This commit is contained in:
Tomasz Miąsko 2020-11-07 00:00:00 +00:00
parent 0256d065d4
commit f78f36cdb7
1 changed files with 1 additions and 0 deletions
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1
compiler/rustc_codegen_ssa/src/mir/rvalue.rs
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@ -502,6 +502,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
} }
mir::Rvalue::NullaryOp(mir::NullOp::SizeOf, ty) => { mir::Rvalue::NullaryOp(mir::NullOp::SizeOf, ty) => {
let ty = self.monomorphize(&ty);
assert!(bx.cx().type_is_sized(ty)); assert!(bx.cx().type_is_sized(ty));
let val = bx.cx().const_usize(bx.cx().layout_of(ty).size.bytes()); let val = bx.cx().const_usize(bx.cx().layout_of(ty).size.bytes());
let tcx = self.cx.tcx(); let tcx = self.cx.tcx();