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use bigint printer when int attr exceeds uint64 range #12

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use bigint printer when int attr exceeds uint64 range #12

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11 changes: 10 additions & 1 deletion zirgen/compiler/codegen/RustLanguageSyntax.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,16 @@ void RustLanguageSyntax::fallbackEmitLiteral(CodegenEmitter& cg,
mlir::Type ty,
mlir::Attribute value) {
TypeSwitch<Attribute>(value)
.Case<IntegerAttr>([&](auto intAttr) { cg << intAttr.getValue().getZExtValue(); })
.Case<IntegerAttr>([&](auto intAttr) {
auto maybeInt = intAttr.getValue().tryZExtValue();
// Can we represent the value as a uint64, or is it large enough
// to need a more expensive string formatting operation?
if (maybeInt) {
cg << *maybeInt;
} else {
intAttr.getValue().print(*cg.getOutputStream(), /*signed*/ false);
}
})
.Case<StringAttr>([&](auto strAttr) { cg.emitEscapedString(strAttr); })
.Default([&](auto) {
llvm::errs() << "Don't know how to emit type " << ty << " into rust++ with value " << value
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