Implement cast bool to X
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5012 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelSimple.cpp b/lib/Target/X86/X86ISelSimple.cpp
index a6b518f..a8ed6f6 100644
--- a/lib/Target/X86/X86ISelSimple.cpp
+++ b/lib/Target/X86/X86ISelSimple.cpp
@@ -854,7 +854,7 @@
// 4) cast {int, uint, ptr} to {short, ushort}
// cast {int, uint, ptr} to {sbyte, ubyte}
// cast {short, ushort} to {sbyte, ubyte}
- //
+
// 1) Implement casts to bool by using compare on the operand followed
// by set if not zero on the result.
if (targetType == Type::BoolTy)
@@ -863,10 +863,11 @@
BuildMI (BB, X86::SETNEr, 1, destReg);
return;
}
+
// 2) Implement casts between values of the same type class (as determined
// by getClass) by using a register-to-register move.
- unsigned int srcClass = getClass (sourceType);
- unsigned int targClass = getClass (targetType);
+ unsigned srcClass = sourceType == Type::BoolTy ? cByte : getClass(sourceType);
+ unsigned targClass = getClass (targetType);
static const unsigned regRegMove[] = {
X86::MOVrr8, X86::MOVrr16, X86::MOVrr32
};