================
@@ -10,3 +10,36 @@
! RUN: %flang -fno-omit-frame-pointer --target=x86-none-none -fsyntax-only
-### %s -o %t 2>&1 | FileCheck %s --check-prefix=CHECK-ALLFP
! CHECK-ALLFP: "-fc1"{{.*}}"-mframe-pointer=all"
+
+! // =======
+
+! Default behavior in x86_64-unknown-linux-gnu, -mframe-pointer=all at -O0
level.
+
+! RUN: %flang -O0 --target=x86_64-unknown-linux-gnu -### %s 2>&1 | FileCheck
%s --check-prefix=CHECK-FRAME-POINTER-ALL
+! RUN: %flang -O0 -momit-leaf-frame-pointer --target=x86_64-unknown-linux-gnu
-### %s 2>&1 | FileCheck %s --check-prefix=CHECK-FRAME-POINTER-NON-LEAF
+! RUN: %flang -O0 -mno-omit-leaf-frame-pointer
--target=x86_64-unknown-linux-gnu -### %s 2>&1 | FileCheck %s
--check-prefix=CHECK-FRAME-POINTER-ALL
+! RUN: %flang -O0 -fomit-frame-pointer -momit-leaf-frame-pointer
--target=x86_64-unknown-linux-gnu -### %s 2>&1 | FileCheck %s
--check-prefix=CHECK-FRAME-POINTER-NONE
+! RUN: %flang -fno-omit-frame-pointer -momit-leaf-frame-pointer
-mno-omit-leaf-frame-pointer --target=x86_64-unknown-linux-gnu -### %s 2>&1 |
FileCheck %s --check-prefix=CHECK-FRAME-POINTER-ALL
+
+! Default behavior in x86_64-unknown-linux-gnu, -mframe-pointer=none at
-O1/-O2/-O3 level.
----------------
tarunprabhu wrote:
nit: Saying "Default behavior in x86_64-unknown-linux-gnu" suggests that it is
the default for that specific target triple. Based on your clarification for an
earlier question, this default is true on x86_64 in general. If that is
correct, then just specifying the architecture would be clearer.
```suggestion
! Default behavior in x86-64, -mframe-pointer=none at -O1/-O2/-O3 level.
```
https://github.com/llvm/llvm-project/pull/216700
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