[SPARC] Fix BooleanContents, so that select of a trunc doesn't
eliminate the trunc.
Differential Revision: http://reviews.llvm.org/D10442
llvm-svn: 245444
diff --git a/llvm/lib/Target/Sparc/SparcISelLowering.cpp b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
index 1811631..9c8a0a6 100644
--- a/llvm/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/llvm/lib/Target/Sparc/SparcISelLowering.cpp
@@ -1423,6 +1423,14 @@
: TargetLowering(TM), Subtarget(&STI) {
MVT PtrVT = MVT::getIntegerVT(8 * TM.getPointerSize());
+ // Instructions which use registers as conditionals examine all the
+ // bits (as does the pseudo SELECT_CC expansion). I don't think it
+ // matters much whether it's ZeroOrOneBooleanContent, or
+ // ZeroOrNegativeOneBooleanContent, so, arbitrarily choose the
+ // former.
+ setBooleanContents(ZeroOrOneBooleanContent);
+ setBooleanVectorContents(ZeroOrOneBooleanContent);
+
// Set up the register classes.
addRegisterClass(MVT::i32, &SP::IntRegsRegClass);
addRegisterClass(MVT::f32, &SP::FPRegsRegClass);