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Prevent BuildPhi from encountering a null llvm_entry_block (#4663)

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There is a scenario where `aot_compile_op_block()` does not prepare a block for
`if`. As a result, the return value of `LLVMBuildPhi()` in
`push_aot_block_to_stack_and_pass_params()` will be dangling, leading to a
memory leak as it cannot be released.
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liang.he 2025-10-16 10:19:44 +08:00 committed by GitHub
parent 163acd2259
commit 826ae6eb01
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1 changed files with 11 additions and 9 deletions
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10
core/iwasm/compilation/aot_emit_control.c
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@ -495,16 +495,18 @@ push_aot_block_to_stack_and_pass_params(AOTCompContext *comp_ctx,
/* Create param phis */ /* Create param phis */
for (i = 0; i < block->param_count; i++) { for (i = 0; i < block->param_count; i++) {
if (block->llvm_entry_block) {
SET_BUILDER_POS(block->llvm_entry_block); SET_BUILDER_POS(block->llvm_entry_block);
snprintf(name, sizeof(name), "%s%d_phi%d", snprintf(name, sizeof(name), "%s%d_phi%d",
block_name_prefix[block->label_type], block->block_index, block_name_prefix[block->label_type],
i); block->block_index, i);
if (!(block->param_phis[i] = LLVMBuildPhi( if (!(block->param_phis[i] = LLVMBuildPhi(
comp_ctx->builder, TO_LLVM_TYPE(block->param_types[i]), comp_ctx->builder,
name))) { TO_LLVM_TYPE(block->param_types[i]), name))) {
aot_set_last_error("llvm build phi failed."); aot_set_last_error("llvm build phi failed.");
goto fail; goto fail;
} }
}
if (block->label_type == LABEL_TYPE_IF if (block->label_type == LABEL_TYPE_IF
&& !block->skip_wasm_code_else && block->llvm_else_block) { && !block->skip_wasm_code_else && block->llvm_else_block) {