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 a601660..ac4084c 100644
--- a/lib/Target/X86/InstSelectSimple.cpp
+++ b/lib/Target/X86/InstSelectSimple.cpp
@@ -641,9 +641,20 @@
//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)