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Stop statement generation after terminating instruction in current block (LLVM C API)

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gingerBill
2020-06-10 13:57:25 +01:00
parent 97d3d4ff6f
commit d0920804c3
1 changed files with 25 additions and 0 deletions
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25
src/llvm_backend.cpp
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@@ -3878,7 +3878,32 @@ lbValue lb_emit_logical_binary_expr(lbProcedure *p, TokenKind op, Ast *left, Ast
}
bool lb_is_instr_terminating(LLVMValueRef instr) {
if (instr != nullptr) {
LLVMOpcode op = LLVMGetInstructionOpcode(instr);
switch (op) {
case LLVMRet:
case LLVMBr:
case LLVMSwitch:
case LLVMIndirectBr:
case LLVMInvoke:
case LLVMUnreachable:
case LLVMCallBr:
return true;
}
}
return false;
}
void lb_build_stmt(lbProcedure *p, Ast *node) {
if (p->curr_block != nullptr) {
LLVMValueRef last_instr = LLVMGetLastInstruction(p->curr_block->block);
if (lb_is_instr_terminating(last_instr)) {
return;
}
}
u64 prev_state_flags = p->module->state_flags;
defer (p->module->state_flags = prev_state_flags);