From: Brian Gaeke <gaeke@uiuc.edu>
Date: Tue, 3 Dec 2002 07:36:03 +0000 (+0000)
Subject: brg
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=07f02614f668693e8f2ed562c52e5664ff1ce0fe;p=oota-llvm.git

brg

Add support for cast ... to bool in visitCastInst (it's a start, anyways...)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4883 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/InstSelectSimple.cpp b/lib/Target/X86/InstSelectSimple.cpp
index a6016604132..ac4084cbbb5 100644
--- a/lib/Target/X86/InstSelectSimple.cpp
+++ b/lib/Target/X86/InstSelectSimple.cpp
@@ -641,9 +641,20 @@ ISel::visitCastInst (CastInst &CI)
 //the former is that the register allocator could use any register it wants,
 //but for now this obviously doesn't matter.  :)
 
-// if target type is bool
-// Emit Compare
-// Emit Set-if-not-zero
+  Type *targetType = CI.getType ();
+  Value *operand = CI.getOperand (0);
+  unsigned int operandReg = getReg (operand);
+  Type *sourceType = operand->getType ();
+  unsigned int destReg = getReg (CI);
+
+  // cast to bool:
+  if (targetType == Type::BoolTy) {
+    // Emit Compare
+    BuildMI (BB, X86::CMPri8, 2).addReg (operandReg).addZImm (0);
+    // Emit Set-if-not-zero
+    BuildMI (BB, X86::SETNEr, 1, destReg);
+    return;
+  }
 
 // if size of target type == size of source type
 // Emit Mov reg(target) <- reg(source)
diff --git a/lib/Target/X86/X86ISelSimple.cpp b/lib/Target/X86/X86ISelSimple.cpp
index a6016604132..ac4084cbbb5 100644
--- a/lib/Target/X86/X86ISelSimple.cpp
+++ b/lib/Target/X86/X86ISelSimple.cpp
@@ -641,9 +641,20 @@ ISel::visitCastInst (CastInst &CI)
 //the former is that the register allocator could use any register it wants,
 //but for now this obviously doesn't matter.  :)
 
-// if target type is bool
-// Emit Compare
-// Emit Set-if-not-zero
+  Type *targetType = CI.getType ();
+  Value *operand = CI.getOperand (0);
+  unsigned int operandReg = getReg (operand);
+  Type *sourceType = operand->getType ();
+  unsigned int destReg = getReg (CI);
+
+  // cast to bool:
+  if (targetType == Type::BoolTy) {
+    // Emit Compare
+    BuildMI (BB, X86::CMPri8, 2).addReg (operandReg).addZImm (0);
+    // Emit Set-if-not-zero
+    BuildMI (BB, X86::SETNEr, 1, destReg);
+    return;
+  }
 
 // if size of target type == size of source type
 // Emit Mov reg(target) <- reg(source)