[ARM] Move Triple::getARMCPUForArch into ARMTargetParser

This is very backend specific so either belongs in Toolchains/ARM or in
ARMTargetParser. Since it is used in lldb, ARMTargetParser made more sense.

This is part of an effort to move information about ARM/AArch64 architecture
versions, extensions and CPUs into their respective TargetParsers.

Differential Revision: https://reviews.llvm.org/D137564

1 files changed, 66 insertions, 1 deletions

diff --git a/llvm/unittests/Support/TargetParserTest.cpp b/llvm/unittests/Support/TargetParserTest.cpp
index 1e0dc33..d94005e 100644
--- a/llvm/unittests/Support/TargetParserTest.cpp
+++ b/llvm/unittests/Support/TargetParserTest.cpp
@@ -6,12 +6,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Support/TargetParser.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
 #include "llvm/Support/AArch64TargetParser.h"
 #include "llvm/Support/ARMBuildAttributes.h"
 #include "llvm/Support/FormatVariadic.h"
-#include "llvm/Support/TargetParser.h"
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include <string>
@@ -871,6 +872,70 @@ TEST(TargetParserTest, ARMparseArchVersion) {
       EXPECT_EQ(5u, ARM::parseArchVersion(ARMArch[i]));
 }
 
+TEST(TargetParserTest, getARMCPUForArch) {
+  // Platform specific defaults.
+  {
+    llvm::Triple Triple("arm--nacl");
+    EXPECT_EQ("cortex-a8", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("arm--openbsd");
+    EXPECT_EQ("cortex-a8", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armv6-unknown-freebsd");
+    EXPECT_EQ("arm1176jzf-s", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("thumbv6-unknown-freebsd");
+    EXPECT_EQ("arm1176jzf-s", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armebv6-unknown-freebsd");
+    EXPECT_EQ("arm1176jzf-s", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("arm--win32");
+    EXPECT_EQ("cortex-a9", ARM::getARMCPUForArch(Triple));
+    EXPECT_EQ("generic", ARM::getARMCPUForArch(Triple, "armv8-a"));
+  }
+  // Some alternative architectures
+  {
+    llvm::Triple Triple("armv7k-apple-ios9");
+    EXPECT_EQ("cortex-a7", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armv7k-apple-watchos3");
+    EXPECT_EQ("cortex-a7", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armv7k-apple-tvos9");
+    EXPECT_EQ("cortex-a7", ARM::getARMCPUForArch(Triple));
+  }
+  // armeb is permitted, but armebeb is not
+  {
+    llvm::Triple Triple("armeb-none-eabi");
+    EXPECT_EQ("arm7tdmi", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armebeb-none-eabi");
+    EXPECT_EQ("", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armebv6eb-none-eabi");
+    EXPECT_EQ("", ARM::getARMCPUForArch(Triple));
+  }
+  // xscaleeb is permitted, but armebxscale is not
+  {
+    llvm::Triple Triple("xscaleeb-none-eabi");
+    EXPECT_EQ("xscale", ARM::getARMCPUForArch(Triple));
+  }
+  {
+    llvm::Triple Triple("armebxscale-none-eabi");
+    EXPECT_EQ("", ARM::getARMCPUForArch(Triple));
+  }
+}
+
 class AArch64CPUTestFixture
     : public ::testing::TestWithParam<ARMCPUTestParams> {};