This enables a few rules such as ARM's uxtb instruction.
llvm-svn: 319457
define zeroext i8 @test_ext_i8(i8 %x) {
; CHECK-LABEL: test_ext_i8:
-; CHECK: and r0, r0, #255
+; CHECK: uxtb r0, r0
; CHECK: bx lr
entry:
return failedImport("Dst pattern child isn't a leaf node or an MBB" + llvm::to_string(*DstChild));
}
+ // It could be a specific immediate in which case we should just check for
+ // that immediate.
+ if (const IntInit *ChildIntInit =
+ dyn_cast<IntInit>(DstChild->getLeafValue())) {
+ DstMIBuilder.addRenderer<ImmRenderer>(ChildIntInit->getValue());
+ return InsertPt;
+ }
+
// Otherwise, we're looking for a bog-standard RegisterClass operand.
if (auto *ChildDefInit = dyn_cast<DefInit>(DstChild->getLeafValue())) {
auto *ChildRec = ChildDefInit->getDef();