From: Eli Friedman <eli.friedman@gmail.com>
Date: Wed, 2 Jun 2010 00:27:18 +0000 (+0000)
Subject: Don't try to custom-lower 64-bit add-with-overflow and friends on x86-32; the
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=a993f0a45fed5e33eb480cb5c8b9c02a76c6602d;p=oota-llvm.git

Don't try to custom-lower 64-bit add-with-overflow and friends on x86-32; the
x86 backend currently doesn't know how to handle them.

This doesn't really fix anything because LegalizeTypes doesn't know how to
handle them either.  We do get a better error message, though.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105305 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 0fd87bd7447..bb80ace3c24 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -976,15 +976,17 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
 
   // Add/Sub/Mul with overflow operations are custom lowered.
   setOperationAction(ISD::SADDO, MVT::i32, Custom);
-  setOperationAction(ISD::SADDO, MVT::i64, Custom);
   setOperationAction(ISD::UADDO, MVT::i32, Custom);
-  setOperationAction(ISD::UADDO, MVT::i64, Custom);
   setOperationAction(ISD::SSUBO, MVT::i32, Custom);
-  setOperationAction(ISD::SSUBO, MVT::i64, Custom);
   setOperationAction(ISD::USUBO, MVT::i32, Custom);
-  setOperationAction(ISD::USUBO, MVT::i64, Custom);
   setOperationAction(ISD::SMULO, MVT::i32, Custom);
-  setOperationAction(ISD::SMULO, MVT::i64, Custom);
+  if (Subtarget->is64Bit()) {
+    setOperationAction(ISD::SADDO, MVT::i64, Custom);
+    setOperationAction(ISD::UADDO, MVT::i64, Custom);
+    setOperationAction(ISD::SSUBO, MVT::i64, Custom);
+    setOperationAction(ISD::USUBO, MVT::i64, Custom);
+    setOperationAction(ISD::SMULO, MVT::i64, Custom);
+  }
 
   if (!Subtarget->is64Bit()) {
     // These libcalls are not available in 32-bit.