[llvm] 5ecf85a - [AArch64] Add native CPU detection for Neoverse N1

[Sjoerd Meijer via llvm-commits]

Author: Sjoerd Meijer
Date: 2020-05-28T19:54:18+01:00
New Revision: 5ecf85a5fcb71fc616afef8d22d2bfd9c7854402

URL: https://github.com/llvm/llvm-project/commit/5ecf85a5fcb71fc616afef8d22d2bfd9c7854402
DIFF: https://github.com/llvm/llvm-project/commit/5ecf85a5fcb71fc616afef8d22d2bfd9c7854402.diff

LOG: [AArch64] Add native CPU detection for Neoverse N1

Map the CPU ID value 0xd0c to "neoverse-n1".

Patch by James Greenhalgh.

Differential Revision: https://reviews.llvm.org/D80736

Added: 
    

Modified: 
    llvm/lib/Support/Host.cpp
    llvm/unittests/Support/Host.cpp

Removed: 
    


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diff  --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index d80c7228f6e0..a3a0a4c2d01a 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -204,6 +204,7 @@ StringRef sys::detail::getHostCPUNameForARM(StringRef ProcCpuinfoContent) {
             .Case("0xd09", "cortex-a73")
             .Case("0xd0a", "cortex-a75")
             .Case("0xd0b", "cortex-a76")
+            .Case("0xd0c", "neoverse-n1")
             .Default("generic");
   }
 

diff  --git a/llvm/unittests/Support/Host.cpp b/llvm/unittests/Support/Host.cpp
index dd43f041d0e8..7d43366631c5 100644
--- a/llvm/unittests/Support/Host.cpp
+++ b/llvm/unittests/Support/Host.cpp
@@ -100,6 +100,10 @@ TEST(getLinuxHostCPUName, AArch64) {
   EXPECT_EQ(sys::detail::getHostCPUNameForARM("CPU implementer : 0x41\n"
                                               "CPU part        : 0xd03"),
             "cortex-a53");
+
+  EXPECT_EQ(sys::detail::getHostCPUNameForARM("CPU implementer : 0x41\n"
+                                              "CPU part        : 0xd0c"),
+            "neoverse-n1");
   // Verify that both CPU implementer and CPU part are checked:
   EXPECT_EQ(sys::detail::getHostCPUNameForARM("CPU implementer : 0x40\n"
                                               "CPU part        : 0xd03"),