diff --git a/llvm/include/llvm/Support/ARMTargetParser.def b/llvm/include/llvm/Support/ARMTargetParser.def
--- a/llvm/include/llvm/Support/ARMTargetParser.def
+++ b/llvm/include/llvm/Support/ARMTargetParser.def
@@ -220,7 +220,6 @@
 ARM_CPU_NAME("arm920", ARMV4T, FK_NONE, false, ARM::AEK_NONE)
 ARM_CPU_NAME("arm920t", ARMV4T, FK_NONE, false, ARM::AEK_NONE)
 ARM_CPU_NAME("arm922t", ARMV4T, FK_NONE, false, ARM::AEK_NONE)
-ARM_CPU_NAME("arm9312", ARMV4T, FK_NONE, false, ARM::AEK_NONE)
 ARM_CPU_NAME("arm940t", ARMV4T, FK_NONE, false, ARM::AEK_NONE)
 ARM_CPU_NAME("ep9312", ARMV4T, FK_NONE, false, ARM::AEK_NONE)
 ARM_CPU_NAME("arm10tdmi", ARMV5T, FK_NONE, true, ARM::AEK_NONE)
diff --git a/llvm/unittests/Support/TargetParserTest.cpp b/llvm/unittests/Support/TargetParserTest.cpp
--- a/llvm/unittests/Support/TargetParserTest.cpp
+++ b/llvm/unittests/Support/TargetParserTest.cpp
@@ -143,7 +143,6 @@
         ARMCPUTestParams("arm920", "armv4t", "none", ARM::AEK_NONE, "4T"),
         ARMCPUTestParams("arm920t", "armv4t", "none", ARM::AEK_NONE, "4T"),
         ARMCPUTestParams("arm922t", "armv4t", "none", ARM::AEK_NONE, "4T"),
-        ARMCPUTestParams("arm9312", "armv4t", "none", ARM::AEK_NONE, "4T"),
         ARMCPUTestParams("arm940t", "armv4t", "none", ARM::AEK_NONE, "4T"),
         ARMCPUTestParams("ep9312", "armv4t", "none", ARM::AEK_NONE, "4T"),
         ARMCPUTestParams("arm10tdmi", "armv5t", "none", ARM::AEK_NONE, "5T"),
@@ -389,7 +388,7 @@
                          ARM::AEK_HWDIVARM | ARM::AEK_HWDIVTHUMB | ARM::AEK_DSP,
                          "7-S")));
 
-static constexpr unsigned NumARMCPUArchs = 91;
+static constexpr unsigned NumARMCPUArchs = 90;
 
 TEST(TargetParserTest, testARMCPUArchList) {
   SmallVector<StringRef, NumARMCPUArchs> List;