[PowerPC] Handle selection of compare instructions in fast-isel.
Mostly trivial patch adding support for compares. The meat of the
work was added with the branch support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189639 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCFastISel.cpp b/lib/Target/PowerPC/PPCFastISel.cpp
index 14a4b31..aeda78b 100644
--- a/lib/Target/PowerPC/PPCFastISel.cpp
+++ b/lib/Target/PowerPC/PPCFastISel.cpp
@@ -108,6 +108,7 @@
bool SelectStore(const Instruction *I);
bool SelectBranch(const Instruction *I);
bool SelectIndirectBr(const Instruction *I);
+ bool SelectCmp(const Instruction *I);
bool SelectBinaryIntOp(const Instruction *I, unsigned ISDOpcode);
bool SelectRet(const Instruction *I);
bool SelectIntExt(const Instruction *I);
@@ -1065,6 +1066,23 @@
return true;
}
+// Attempt to fast-select a compare instruction.
+bool PPCFastISel::SelectCmp(const Instruction *I) {
+ const CmpInst *CI = cast<CmpInst>(I);
+ Optional<PPC::Predicate> OptPPCPred = getComparePred(CI->getPredicate());
+ if (!OptPPCPred)
+ return false;
+
+ unsigned CondReg = createResultReg(&PPC::CRRCRegClass);
+
+ if (!PPCEmitCmp(CI->getOperand(0), CI->getOperand(1), CI->isUnsigned(),
+ CondReg))
+ return false;
+
+ UpdateValueMap(I, CondReg);
+ return true;
+}
+
// Attempt to fast-select an integer extend instruction.
bool PPCFastISel::SelectIntExt(const Instruction *I) {
Type *DestTy = I->getType();