* Implement cast (long|ulong) to bool
* Fix cast of (short|ushort|int|uint) to bool to work right
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6510 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/InstSelectSimple.cpp b/lib/Target/X86/InstSelectSimple.cpp
index c62e68d..3479b73 100644
--- a/lib/Target/X86/InstSelectSimple.cpp
+++ b/lib/Target/X86/InstSelectSimple.cpp
@@ -1552,10 +1552,28 @@
// Implement casts to bool by using compare on the operand followed by set if
// not zero on the result.
if (DestTy == Type::BoolTy) {
- if (SrcClass == cFP || SrcClass == cLong)
- abort(); // FIXME: implement cast (long & FP) to bool
-
- BMI(BB, IP, X86::CMPri8, 2).addReg(SrcReg).addZImm(0);
+ switch (SrcClass) {
+ case cByte:
+ BMI(BB, IP, X86::TESTrr8, 2).addReg(SrcReg).addReg(SrcReg);
+ break;
+ case cShort:
+ BMI(BB, IP, X86::TESTrr16, 2).addReg(SrcReg).addReg(SrcReg);
+ break;
+ case cInt:
+ BMI(BB, IP, X86::TESTrr32, 2).addReg(SrcReg).addReg(SrcReg);
+ break;
+ case cLong: {
+ unsigned TmpReg = makeAnotherReg(Type::IntTy);
+ BMI(BB, IP, X86::ORrr32, 2, TmpReg).addReg(SrcReg).addReg(SrcReg+1);
+ break;
+ }
+ case cFP:
+ assert(0 && "FIXME: implement cast FP to bool");
+ abort();
+ }
+
+ // If the zero flag is not set, then the value is true, set the byte to
+ // true.
BMI(BB, IP, X86::SETNEr, 1, DestReg);
return;
}