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std: more efficient inline assembly

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This commit is contained in:
Andrew Kelley
2015-12-15 01:55:52 -07:00
parent a292eb8d64
commit 673d638070
2 changed files with 13 additions and 25 deletions
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12
src/codegen.cpp
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@@ -805,14 +805,12 @@ static LLVMValueRef gen_asm_expr(CodeGen *g, AstNode *node) {
LLVMValueRef *param_values = allocate<LLVMValueRef>(input_and_output_count);
for (int i = 0; i < asm_expr->output_list.length; i += 1, total_index += 1) {
AsmOutput *asm_output = asm_expr->output_list.at(i);
bool is_return = false;
if (buf_eql_str(&asm_output->constraint, "=m")) {
buf_append_str(&constraint_buf, "=*m");
} else if (buf_eql_str(&asm_output->constraint, "=r")) {
buf_append_str(&constraint_buf, "=r");
is_return = true;
bool is_return = (asm_output->return_type != nullptr);
assert(*buf_ptr(&asm_output->constraint) == '=');
if (is_return) {
buf_appendf(&constraint_buf, "=%s", buf_ptr(&asm_output->constraint) + 1);
} else {
zig_panic("TODO unable to handle anything other than '=m' and '=r' for outputs");
buf_appendf(&constraint_buf, "=*%s", buf_ptr(&asm_output->constraint) + 1);
}
if (total_index + 1 < total_constraint_count) {
buf_append_char(&constraint_buf, ',');