[AArch64] Add support for -mcpu=gb10. (#146515)

This patch adds support for -mcpu=gb10 (NVIDIA GB10). This is a
big.LITTLE cluster of Cortex-X925 and Cortex-A725 cores. The appropriate
MIDR numbers are added to detect them in -mcpu=native.

We did not add an -mcpu=cortex-x925.cortex-a725 option because GB10 does
include the crypto instructions which we want on by default, and the
current convention is to not enable such extensions for Arm Cortex cores
in -mcpu where they are optional in the IP.

Relevant GCC patch:
https://gcc.gnu.org/pipermail/gcc-patches/2025-June/687005.html

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/unittests/TargetParser/TargetParserTest.cpp b/llvm/unittests/TargetParser/TargetParserTest.cpp
index 97ee8dd..1d7ad8a 100644
--- a/llvm/unittests/TargetParser/TargetParserTest.cpp
+++ b/llvm/unittests/TargetParser/TargetParserTest.cpp
@@ -1164,6 +1164,7 @@ INSTANTIATE_TEST_SUITE_P(
                       AArch64CPUTestParams("a64fx", "armv8.2-a"),
                       AArch64CPUTestParams("fujitsu-monaka", "armv9.3-a"),
                       AArch64CPUTestParams("carmel", "armv8.2-a"),
+                      AArch64CPUTestParams("gb10", "armv9.2-a"),
                       AArch64CPUTestParams("grace", "armv9-a"),
                       AArch64CPUTestParams("olympus", "armv9.2-a"),
                       AArch64CPUTestParams("saphira", "armv8.4-a"),
@@ -1260,7 +1261,7 @@ INSTANTIATE_TEST_SUITE_P(
     AArch64CPUAliasTestParams::PrintToStringParamName);
 
 // Note: number of CPUs includes aliases.
-static constexpr unsigned NumAArch64CPUArchs = 90;
+static constexpr unsigned NumAArch64CPUArchs = 91;
 
 TEST(TargetParserTest, testAArch64CPUArchList) {
   SmallVector<StringRef, NumAArch64CPUArchs> List;