From: Chris Lattner <sabre@nondot.org>
Date: Sun, 17 Oct 2004 02:42:42 +0000 (+0000)
Subject: Add support for unreachable and undef
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=d14d5b422371c1e10ed1866cd6e0c7ac33738a79;p=oota-llvm.git

Add support for unreachable and undef


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17074 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/Sparc/SparcV8ISelSimple.cpp b/lib/Target/Sparc/SparcV8ISelSimple.cpp
index 93711eaeeb4..5117a755761 100644
--- a/lib/Target/Sparc/SparcV8ISelSimple.cpp
+++ b/lib/Target/Sparc/SparcV8ISelSimple.cpp
@@ -90,6 +90,7 @@ namespace {
     void visitCallInst(CallInst &I);
     void visitReturnInst(ReturnInst &I);
     void visitBranchInst(BranchInst &I);
+    void visitUnreachableInst(UnreachableInst &I) {}
     void visitCastInst(CastInst &I);
     void visitLoadInst(LoadInst &I);
     void visitStoreInst(StoreInst &I);
@@ -230,6 +231,11 @@ void V8ISel::copyConstantToRegister(MachineBasicBlock *MBB,
       std::cerr << "Copying this constant expr not yet handled: " << *CE;
       abort();
     }
+  } else if (isa<UndefValue>(C)) {
+    BuildMI(*MBB, IP, V8::IMPLICIT_DEF, 0, R);
+    if (getClassB (C->getType ()) == cLong)
+      BuildMI(*MBB, IP, V8::IMPLICIT_DEF, 0, R+1);
+    return;
   }
 
   if (C->getType()->isIntegral ()) {
diff --git a/lib/Target/SparcV8/SparcV8ISelSimple.cpp b/lib/Target/SparcV8/SparcV8ISelSimple.cpp
index 93711eaeeb4..5117a755761 100644
--- a/lib/Target/SparcV8/SparcV8ISelSimple.cpp
+++ b/lib/Target/SparcV8/SparcV8ISelSimple.cpp
@@ -90,6 +90,7 @@ namespace {
     void visitCallInst(CallInst &I);
     void visitReturnInst(ReturnInst &I);
     void visitBranchInst(BranchInst &I);
+    void visitUnreachableInst(UnreachableInst &I) {}
     void visitCastInst(CastInst &I);
     void visitLoadInst(LoadInst &I);
     void visitStoreInst(StoreInst &I);
@@ -230,6 +231,11 @@ void V8ISel::copyConstantToRegister(MachineBasicBlock *MBB,
       std::cerr << "Copying this constant expr not yet handled: " << *CE;
       abort();
     }
+  } else if (isa<UndefValue>(C)) {
+    BuildMI(*MBB, IP, V8::IMPLICIT_DEF, 0, R);
+    if (getClassB (C->getType ()) == cLong)
+      BuildMI(*MBB, IP, V8::IMPLICIT_DEF, 0, R+1);
+    return;
   }
 
   if (C->getType()->isIntegral ()) {