[clang] [Clang] Add -fwrapv-pointer flag (PR #122486)

[Nikita Popov via cfe-commits]

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@@ -1,11 +1,24 @@
 // RUN: %clang -### -S -fwrapv -fno-wrapv -fwrapv %s 2>&1 | FileCheck -check-prefix=CHECK1 %s
 // CHECK1: -fwrapv
 //
+// RUN: %clang -### -S -fwrapv-pointer -fno-wrapv-pointer -fwrapv-pointer %s 2>&1 | FileCheck -check-prefix=CHECK1-POINTER %s
+// CHECK1-POINTER: -fwrapv-pointer
+//
 // RUN: %clang -### -S -fstrict-overflow -fno-strict-overflow %s 2>&1 | FileCheck -check-prefix=CHECK2 %s
-// CHECK2: -fwrapv
+// CHECK2: -fwrapv{{.*}}-fwrapv-pointer
 //
 // RUN: %clang -### -S -fwrapv -fstrict-overflow %s 2>&1 | FileCheck -check-prefix=CHECK3 %s
 // CHECK3: -fwrapv
 //
+// RUN: %clang -### -S -fwrapv-pointer -fstrict-overflow %s 2>&1 | FileCheck -check-prefix=CHECK3-POINTER %s
+// CHECK3-POINTER: -fwrapv-pointer
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nikic wrote:

Good idea, I've switched the last four tests to use `--implicit-check-not`.

https://github.com/llvm/llvm-project/pull/122486