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IR: handle phi instruction with 0 resulting incoming values

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This commit is contained in:
Andrew Kelley 2016-12-30 18:47:54 -05:00
parent 6bbee194b9
commit 29bb175f4f
1 changed files with 5 additions and 1 deletions
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6
src/ir.cpp
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@ -7938,7 +7938,11 @@ static TypeTableEntry *ir_analyze_instruction_phi(IrAnalyze *ira, IrInstructionP
new_incoming_blocks.append(predecessor->other);
new_incoming_values.append(new_value);
}
assert(new_incoming_blocks.length != 0);
if (new_incoming_blocks.length == 0) {
ir_build_const_from(ira, &phi_instruction->base, false);
return ira->codegen->builtin_types.entry_void;
}
if (new_incoming_blocks.length == 1) {
IrInstruction *first_value = new_incoming_values.at(0);