================
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s --check-prefix=NOWRAP
+// RUN: %clang_cc1 -fno-wrapv -emit-llvm %s -o - | FileCheck %s
--check-prefix=NOWRAP
+// RUN: %clang_cc1 -fno-wrapv -fms-compatibility -emit-llvm %s -o - |
FileCheck %s --check-prefix=NOWRAP
+// RUN: %clang_cc1 -fwrapv -emit-llvm %s -o - | FileCheck %s
--check-prefix=WRAP
+// RUN: %clang_cc1 -fms-compatibility -emit-llvm %s -o - | FileCheck %s
--check-prefix=WRAP
----------------
eleviant wrote:
I guess -ftrapv has priority over -fwrapv (even if implictly defined by
-fms-compatibility), but I'll double-check
```
if (Args.hasArg(OPT_ftrapv)) {
Opts.setSignedOverflowBehavior(LangOptions::SOB_Trapping);
// Set the handler, if one is specified.
Opts.OverflowHandler =
std::string(Args.getLastArgValue(OPT_ftrapv_handler));
} else if (Args.hasFlag(OPT_fwrapv, OPT_fno_wrapv, Opts.MSVCCompat)) {
Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
}
```
https://github.com/llvm/llvm-project/pull/198538
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