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[wasm] Allocate a variable for all ref typed vregs and mark them as v… #51580

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Merged
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Apr 20, 2021
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[wasm] Allocate a variable for all ref typed vregs and mark them as v… #51580

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8 changes: 8 additions & 0 deletions src/mono/mono/mini/ir-emit.h
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,14 @@ alloc_ireg_ref (MonoCompile *cfg)
if (cfg->compute_gc_maps)
mono_mark_vreg_as_ref (cfg, vreg);

#ifdef TARGET_WASM
/*
* For GC stack scanning to work, have to spill all reference variables to the stack.
*/
MonoInst *ins = mono_compile_create_var_for_vreg (cfg, m_class_get_byval_arg (mono_get_object_class ()), OP_LOCAL, vreg);
ins->flags |= MONO_INST_VOLATILE;
#endif

return vreg;
}

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