[SystemZ] Provide basic TargetTransformInfo implementation

This hooks up the TargetTransformInfo machinery for SystemZ,
and provides an implementation of getIntImmCost.

In addition, the patch adds the isLegalICmpImmediate and
isLegalAddImmediate TargetLowering overrides, and updates
a couple of test cases where we now generate slightly
better code.

llvm-svn: 233688

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
index 86baccb658e..b2f8175579f 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZTargetMachine.cpp
@@ -8,6 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "SystemZTargetMachine.h"
+#include "SystemZTargetTransformInfo.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Transforms/Scalar.h"
@@ -108,3 +109,9 @@ void SystemZPassConfig::addPreEmitPass() {
 TargetPassConfig *SystemZTargetMachine::createPassConfig(PassManagerBase &PM) {
   return new SystemZPassConfig(this, PM);
 }
+
+TargetIRAnalysis SystemZTargetMachine::getTargetIRAnalysis() {
+  return TargetIRAnalysis([this](Function &F) {
+    return TargetTransformInfo(SystemZTTIImpl(this, F));
+  });
+}