[clang] [compiler-rt] [llvm] [X86] Sync compiler-rt cpu subtypes and vendors with libgcc and refactor internal cpu type tables in LLVM (PR #171172)

[Phoebe Wang via cfe-commits]

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@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm < %s | FileCheck %s
+
+// Test that __builtin_cpu_is emits the correct ABI value and field offset for
+// every vendor (field offset 0) in llvm/include/llvm/TargetParser/
+// X86TargetParser.def.
+extern void a(const char *);
+
+// CHECK: @__cpu_model = external dso_local global { i32, i32, i32, [1 x i32] }
+
+#define TEST_CPU_IS(NAME, STR)                                                 \
+  void test_##NAME(void) {                                                     \
+    if (__builtin_cpu_is(STR))                                                 \
+      a(STR);                                                                  \
+  }
+
+// CHECK-LABEL: define{{.*}} void @test_intel(
+// CHECK: [[LOAD:%[^ ]+]] = load i32, ptr @__cpu_model
+// CHECK: = icmp eq i32 [[LOAD]], 1
+TEST_CPU_IS(intel, "intel")
+
+// CHECK: = icmp eq i32 {{.*}}, 2
+TEST_CPU_IS(amd, "amd")
+
+// CHECK: = icmp eq i32 {{.*}}, 4
+TEST_CPU_IS(other, "other")
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phoebewang wrote:

How did pre-check pass then? This makes my worry the test doesn't work as intended.

https://github.com/llvm/llvm-project/pull/171172