diff options
Diffstat (limited to 'src/codegen.cpp')
| -rw-r--r-- | src/codegen.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/codegen.cpp b/src/codegen.cpp index 0d6a8a7f50..3a9efc9fa9 100644 --- a/src/codegen.cpp +++ b/src/codegen.cpp @@ -1236,7 +1236,7 @@ static LLVMValueRef get_add_error_return_trace_addr_fn(CodeGen *g) { LLVMTypeRef usize_type_ref = g->builtin_types.entry_usize->type_ref; - // stack_trace.instruction_addresses[stack_trace.index % stack_trace.instruction_addresses.len] = return_address; + // stack_trace.instruction_addresses[stack_trace.index & (stack_trace.instruction_addresses.len - 1)] = return_address; LLVMValueRef err_ret_trace_ptr = LLVMGetParam(fn_val, 0); LLVMValueRef address_value = LLVMGetParam(fn_val, 1); @@ -1254,9 +1254,10 @@ static LLVMValueRef get_add_error_return_trace_addr_fn(CodeGen *g) { LLVMValueRef len_value = gen_load_untyped(g, len_field_ptr, 0, false, ""); LLVMValueRef index_val = gen_load_untyped(g, index_field_ptr, 0, false, ""); - LLVMValueRef modded_val = LLVMBuildURem(g->builder, index_val, len_value, ""); + LLVMValueRef len_val_minus_one = LLVMBuildSub(g->builder, len_value, LLVMConstInt(usize_type_ref, 1, false), ""); + LLVMValueRef masked_val = LLVMBuildAnd(g->builder, index_val, len_val_minus_one, ""); LLVMValueRef address_indices[] = { - modded_val, + masked_val, }; LLVMValueRef ptr_value = gen_load_untyped(g, ptr_field_ptr, 0, false, ""); |