[llvm-exegesis][NFC] Add a way to declare the default counter binding for unbound CPUs for a target.

Summary:
This simplifies the code and moves everything to tablegen for consistency. This
also prepares the ground for adding issue counters.

Reviewers: gchatelet, john.brawn, jsji

Subscribers: nemanjai, mgorny, javed.absar, kbarton, tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D54297

llvm-svn: 346489

2 files changed, 12 insertions, 0 deletions

diff --git a/llvm/unittests/tools/llvm-exegesis/AArch64/TargetTest.cpp b/llvm/unittests/tools/llvm-exegesis/AArch64/TargetTest.cpp
index 8a519bb2e7b..a938db04a48 100644
--- a/llvm/unittests/tools/llvm-exegesis/AArch64/TargetTest.cpp
+++ b/llvm/unittests/tools/llvm-exegesis/AArch64/TargetTest.cpp
@@ -59,6 +59,12 @@ TEST_F(AArch64TargetTest, SetRegToConstant) {
   EXPECT_THAT(Insts, Not(IsEmpty()));
 }
 
+TEST_F(AArch64TargetTest, DefaultPfmCounters) {
+  EXPECT_EQ(ExegesisTarget_->getPfmCounters("").CycleCounter, "CPU_CYCLES");
+  EXPECT_EQ(ExegesisTarget_->getPfmCounters("unknown_cpu").CycleCounter,
+            "CPU_CYCLES");
+}
+
 } // namespace
 } // namespace exegesis
 } // namespace llvm
diff --git a/llvm/unittests/tools/llvm-exegesis/PowerPC/TargetTest.cpp b/llvm/unittests/tools/llvm-exegesis/PowerPC/TargetTest.cpp
index e9f6a55af57..f78c141f871 100644
--- a/llvm/unittests/tools/llvm-exegesis/PowerPC/TargetTest.cpp
+++ b/llvm/unittests/tools/llvm-exegesis/PowerPC/TargetTest.cpp
@@ -59,6 +59,12 @@ TEST_F(PowerPCTargetTest, SetRegToConstant) {
   EXPECT_THAT(Insts, Not(IsEmpty()));
 }
 
+TEST_F(PowerPCTargetTest, DefaultPfmCounters) {
+  EXPECT_EQ(ExegesisTarget_->getPfmCounters("").CycleCounter, "CYCLES");
+  EXPECT_EQ(ExegesisTarget_->getPfmCounters("unknown_cpu").CycleCounter,
+            "CYCLES");
+}
+
 } // namespace
 } // namespace exegesis
 } // namespace llvm