From: Dylan McKay <me@dylanmckay.io>
Date: Sun, 29 Jul 2018 11:38:36 +0000 (+0000)
Subject: [AVR] Re-enable expansion of ADDE/ADDC/SUBE/SUBC in ISel
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ebd090bd41e98e696723d22fdb2a12a39d8c2a58;p=llvm

[AVR] Re-enable expansion of ADDE/ADDC/SUBE/SUBC in ISel

This was disabled in r333748, which broke four tests.

In the future, these need to be updated to UADDO/ADDCARRY or
USUBO/SUBCARRY.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338212 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/AVR/AVRISelLowering.cpp b/lib/Target/AVR/AVRISelLowering.cpp
index c1515571aae..1b412a9c681 100644
--- a/lib/Target/AVR/AVRISelLowering.cpp
+++ b/lib/Target/AVR/AVRISelLowering.cpp
@@ -63,6 +63,13 @@ AVRTargetLowering::AVRTargetLowering(AVRTargetMachine &tm)
 
   setTruncStoreAction(MVT::i16, MVT::i8, Expand);
 
+  for (MVT VT : MVT::integer_valuetypes()) {
+    setOperationAction(ISD::ADDC, VT, Legal);
+    setOperationAction(ISD::SUBC, VT, Legal);
+    setOperationAction(ISD::ADDE, VT, Legal);
+    setOperationAction(ISD::SUBE, VT, Legal);
+  }
+
   // sub (x, imm) gets canonicalized to add (x, -imm), so for illegal types
   // revert into a sub since we don't have an add with immediate instruction.
   setOperationAction(ISD::ADD, MVT::i32, Custom);