[flang-commits] [flang] ea4eb69 - [Flang][Clang] Add support for frame pointers in Flang

Tom Eccles via flang-commits flang-commits at lists.llvm.org
Fri Dec 1 09:10:32 PST 2023


Author: Radu Salavat
Date: 2023-12-01T17:09:59Z
New Revision: ea4eb691f4955e3b784ebf9bc94a47186838c6f2

URL: https://github.com/llvm/llvm-project/commit/ea4eb691f4955e3b784ebf9bc94a47186838c6f2
DIFF: https://github.com/llvm/llvm-project/commit/ea4eb691f4955e3b784ebf9bc94a47186838c6f2.diff

LOG: [Flang][Clang] Add support for frame pointers in Flang

Added: 
    flang/test/Driver/frame-pointer-forwarding.f90

Modified: 
    clang/include/clang/Driver/Options.td
    clang/lib/Driver/ToolChains/Clang.cpp
    clang/lib/Driver/ToolChains/CommonArgs.cpp
    clang/lib/Driver/ToolChains/CommonArgs.h
    clang/lib/Driver/ToolChains/Flang.cpp
    flang/test/Driver/driver-help-hidden.f90
    flang/test/Driver/driver-help.f90
    flang/test/Driver/frontend-forwarding.f90

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index fae70e61375de7c..19d04e82aed4d68 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -3172,7 +3172,8 @@ def fno_ms_compatibility : Flag<["-"], "fno-ms-compatibility">, Group<f_Group>,
 def fno_objc_legacy_dispatch : Flag<["-"], "fno-objc-legacy-dispatch">, Group<f_Group>;
 def fno_objc_weak : Flag<["-"], "fno-objc-weak">, Group<f_Group>,
   Visibility<[ClangOption, CC1Option]>;
-def fno_omit_frame_pointer : Flag<["-"], "fno-omit-frame-pointer">, Group<f_Group>;
+def fno_omit_frame_pointer : Flag<["-"], "fno-omit-frame-pointer">, Group<f_Group>,
+  Visibility<[ClangOption, FlangOption]>;
 defm operator_names : BoolFOption<"operator-names",
   LangOpts<"CXXOperatorNames">, Default<cplusplus.KeyPath>,
   NegFlag<SetFalse, [], [ClangOption, CC1Option],
@@ -3298,6 +3299,7 @@ defm objc_avoid_heapify_local_blocks : BoolFOption<"objc-avoid-heapify-local-blo
   BothFlags<[], [CC1Option], " to avoid heapifying local blocks">>;
 
 def fomit_frame_pointer : Flag<["-"], "fomit-frame-pointer">, Group<f_Group>,
+  Visibility<[ClangOption, FlangOption]>,
   HelpText<"Omit the frame pointer from functions that don't need it. "
   "Some stack unwinding cases, such as profilers and sanitizers, may prefer specifying -fno-omit-frame-pointer. "
   "On many targets, -O1 and higher omit the frame pointer by default. "
@@ -6786,10 +6788,6 @@ def new_struct_path_tbaa : Flag<["-"], "new-struct-path-tbaa">,
 def mdebug_pass : Separate<["-"], "mdebug-pass">,
   HelpText<"Enable additional debug output">,
   MarshallingInfoString<CodeGenOpts<"DebugPass">>;
-def mframe_pointer_EQ : Joined<["-"], "mframe-pointer=">,
-  HelpText<"Specify which frame pointers to retain.">, Values<"all,non-leaf,none">,
-  NormalizedValuesScope<"CodeGenOptions::FramePointerKind">, NormalizedValues<["All", "NonLeaf", "None"]>,
-  MarshallingInfoEnum<CodeGenOpts<"FramePointer">, "None">;
 def mabi_EQ_ieeelongdouble : Flag<["-"], "mabi=ieeelongdouble">,
   HelpText<"Use IEEE 754 quadruple-precision for long double">,
   MarshallingInfoFlag<LangOpts<"PPCIEEELongDouble">>;
@@ -7400,6 +7398,11 @@ def pic_is_pie : Flag<["-"], "pic-is-pie">,
   HelpText<"File is for a position independent executable">,
   MarshallingInfoFlag<LangOpts<"PIE">>;
 
+def mframe_pointer_EQ : Joined<["-"], "mframe-pointer=">,
+  HelpText<"Specify which frame pointers to retain.">, Values<"all,non-leaf,none">,
+  NormalizedValuesScope<"CodeGenOptions::FramePointerKind">, NormalizedValues<["All", "NonLeaf", "None"]>,
+  MarshallingInfoEnum<CodeGenOpts<"FramePointer">, "None">;
+
 
 def dependent_lib : Joined<["--"], "dependent-lib=">,
   HelpText<"Add dependent library">,

diff  --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index b1ce95be38f88d5..f02f7c841b91f0b 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -409,139 +409,6 @@ static bool ShouldEnableAutolink(const ArgList &Args, const ToolChain &TC,
                       Default);
 }
 
-static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
-  switch (Triple.getArch()){
-  default:
-    return false;
-  case llvm::Triple::arm:
-  case llvm::Triple::thumb:
-    // ARM Darwin targets require a frame pointer to be always present to aid
-    // offline debugging via backtraces.
-    return Triple.isOSDarwin();
-  }
-}
-
-static bool useFramePointerForTargetByDefault(const ArgList &Args,
-                                              const llvm::Triple &Triple) {
-  if (Args.hasArg(options::OPT_pg) && !Args.hasArg(options::OPT_mfentry))
-    return true;
-
-  if (Triple.isAndroid()) {
-    switch (Triple.getArch()) {
-    case llvm::Triple::aarch64:
-    case llvm::Triple::arm:
-    case llvm::Triple::armeb:
-    case llvm::Triple::thumb:
-    case llvm::Triple::thumbeb:
-    case llvm::Triple::riscv64:
-      return true;
-    default:
-      break;
-    }
-  }
-
-  switch (Triple.getArch()) {
-  case llvm::Triple::xcore:
-  case llvm::Triple::wasm32:
-  case llvm::Triple::wasm64:
-  case llvm::Triple::msp430:
-    // XCore never wants frame pointers, regardless of OS.
-    // WebAssembly never wants frame pointers.
-    return false;
-  case llvm::Triple::ppc:
-  case llvm::Triple::ppcle:
-  case llvm::Triple::ppc64:
-  case llvm::Triple::ppc64le:
-  case llvm::Triple::riscv32:
-  case llvm::Triple::riscv64:
-  case llvm::Triple::sparc:
-  case llvm::Triple::sparcel:
-  case llvm::Triple::sparcv9:
-  case llvm::Triple::amdgcn:
-  case llvm::Triple::r600:
-  case llvm::Triple::csky:
-  case llvm::Triple::loongarch32:
-  case llvm::Triple::loongarch64:
-    return !areOptimizationsEnabled(Args);
-  default:
-    break;
-  }
-
-  if (Triple.isOSFuchsia() || Triple.isOSNetBSD()) {
-    return !areOptimizationsEnabled(Args);
-  }
-
-  if (Triple.isOSLinux() || Triple.isOSHurd()) {
-    switch (Triple.getArch()) {
-    // Don't use a frame pointer on linux if optimizing for certain targets.
-    case llvm::Triple::arm:
-    case llvm::Triple::armeb:
-    case llvm::Triple::thumb:
-    case llvm::Triple::thumbeb:
-    case llvm::Triple::mips64:
-    case llvm::Triple::mips64el:
-    case llvm::Triple::mips:
-    case llvm::Triple::mipsel:
-    case llvm::Triple::systemz:
-    case llvm::Triple::x86:
-    case llvm::Triple::x86_64:
-      return !areOptimizationsEnabled(Args);
-    default:
-      return true;
-    }
-  }
-
-  if (Triple.isOSWindows()) {
-    switch (Triple.getArch()) {
-    case llvm::Triple::x86:
-      return !areOptimizationsEnabled(Args);
-    case llvm::Triple::x86_64:
-      return Triple.isOSBinFormatMachO();
-    case llvm::Triple::arm:
-    case llvm::Triple::thumb:
-      // Windows on ARM builds with FPO disabled to aid fast stack walking
-      return true;
-    default:
-      // All other supported Windows ISAs use xdata unwind information, so frame
-      // pointers are not generally useful.
-      return false;
-    }
-  }
-
-  return true;
-}
-
-static CodeGenOptions::FramePointerKind
-getFramePointerKind(const ArgList &Args, const llvm::Triple &Triple) {
-  // We have 4 states:
-  //
-  //  00) leaf retained, non-leaf retained
-  //  01) leaf retained, non-leaf omitted (this is invalid)
-  //  10) leaf omitted, non-leaf retained
-  //      (what -momit-leaf-frame-pointer was designed for)
-  //  11) leaf omitted, non-leaf omitted
-  //
-  //  "omit" options taking precedence over "no-omit" options is the only way
-  //  to make 3 valid states representable
-  Arg *A = Args.getLastArg(options::OPT_fomit_frame_pointer,
-                           options::OPT_fno_omit_frame_pointer);
-  bool OmitFP = A && A->getOption().matches(options::OPT_fomit_frame_pointer);
-  bool NoOmitFP =
-      A && A->getOption().matches(options::OPT_fno_omit_frame_pointer);
-  bool OmitLeafFP =
-      Args.hasFlag(options::OPT_momit_leaf_frame_pointer,
-                   options::OPT_mno_omit_leaf_frame_pointer,
-                   Triple.isAArch64() || Triple.isPS() || Triple.isVE() ||
-                   (Triple.isAndroid() && Triple.isRISCV64()));
-  if (NoOmitFP || mustUseNonLeafFramePointerForTarget(Triple) ||
-      (!OmitFP && useFramePointerForTargetByDefault(Args, Triple))) {
-    if (OmitLeafFP)
-      return CodeGenOptions::FramePointerKind::NonLeaf;
-    return CodeGenOptions::FramePointerKind::All;
-  }
-  return CodeGenOptions::FramePointerKind::None;
-}
-
 /// Add a CC1 option to specify the debug compilation directory.
 static const char *addDebugCompDirArg(const ArgList &Args,
                                       ArgStringList &CmdArgs,

diff  --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index efb8b71f24a932c..0ae8e2dce32e94a 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -24,6 +24,7 @@
 #include "MSP430.h"
 #include "Solaris.h"
 #include "clang/Basic/CharInfo.h"
+#include "clang/Basic/CodeGenOptions.h"
 #include "clang/Basic/LangOptions.h"
 #include "clang/Basic/ObjCRuntime.h"
 #include "clang/Basic/Version.h"
@@ -71,6 +72,144 @@ using namespace clang::driver::tools;
 using namespace clang;
 using namespace llvm::opt;
 
+static bool useFramePointerForTargetByDefault(const llvm::opt::ArgList &Args,
+                                              const llvm::Triple &Triple) {
+  if (Args.hasArg(clang::driver::options::OPT_pg) &&
+      !Args.hasArg(clang::driver::options::OPT_mfentry))
+    return true;
+
+  if (Triple.isAndroid()) {
+    switch (Triple.getArch()) {
+    case llvm::Triple::aarch64:
+    case llvm::Triple::arm:
+    case llvm::Triple::armeb:
+    case llvm::Triple::thumb:
+    case llvm::Triple::thumbeb:
+    case llvm::Triple::riscv64:
+      return true;
+    default:
+      break;
+    }
+  }
+
+  switch (Triple.getArch()) {
+  case llvm::Triple::xcore:
+  case llvm::Triple::wasm32:
+  case llvm::Triple::wasm64:
+  case llvm::Triple::msp430:
+    // XCore never wants frame pointers, regardless of OS.
+    // WebAssembly never wants frame pointers.
+    return false;
+  case llvm::Triple::ppc:
+  case llvm::Triple::ppcle:
+  case llvm::Triple::ppc64:
+  case llvm::Triple::ppc64le:
+  case llvm::Triple::riscv32:
+  case llvm::Triple::riscv64:
+  case llvm::Triple::sparc:
+  case llvm::Triple::sparcel:
+  case llvm::Triple::sparcv9:
+  case llvm::Triple::amdgcn:
+  case llvm::Triple::r600:
+  case llvm::Triple::csky:
+  case llvm::Triple::loongarch32:
+  case llvm::Triple::loongarch64:
+    return !clang::driver::tools::areOptimizationsEnabled(Args);
+  default:
+    break;
+  }
+
+  if (Triple.isOSFuchsia() || Triple.isOSNetBSD()) {
+    return !clang::driver::tools::areOptimizationsEnabled(Args);
+  }
+
+  if (Triple.isOSLinux() || Triple.isOSHurd()) {
+    switch (Triple.getArch()) {
+    // Don't use a frame pointer on linux if optimizing for certain targets.
+    case llvm::Triple::arm:
+    case llvm::Triple::armeb:
+    case llvm::Triple::thumb:
+    case llvm::Triple::thumbeb:
+    case llvm::Triple::mips64:
+    case llvm::Triple::mips64el:
+    case llvm::Triple::mips:
+    case llvm::Triple::mipsel:
+    case llvm::Triple::systemz:
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      return !clang::driver::tools::areOptimizationsEnabled(Args);
+    default:
+      return true;
+    }
+  }
+
+  if (Triple.isOSWindows()) {
+    switch (Triple.getArch()) {
+    case llvm::Triple::x86:
+      return !clang::driver::tools::areOptimizationsEnabled(Args);
+    case llvm::Triple::x86_64:
+      return Triple.isOSBinFormatMachO();
+    case llvm::Triple::arm:
+    case llvm::Triple::thumb:
+      // Windows on ARM builds with FPO disabled to aid fast stack walking
+      return true;
+    default:
+      // All other supported Windows ISAs use xdata unwind information, so frame
+      // pointers are not generally useful.
+      return false;
+    }
+  }
+
+  return true;
+}
+
+static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
+  switch (Triple.getArch()) {
+  default:
+    return false;
+  case llvm::Triple::arm:
+  case llvm::Triple::thumb:
+    // ARM Darwin targets require a frame pointer to be always present to aid
+    // offline debugging via backtraces.
+    return Triple.isOSDarwin();
+  }
+}
+
+clang::CodeGenOptions::FramePointerKind
+getFramePointerKind(const llvm::opt::ArgList &Args,
+                    const llvm::Triple &Triple) {
+  // We have 4 states:
+  //
+  //  00) leaf retained, non-leaf retained
+  //  01) leaf retained, non-leaf omitted (this is invalid)
+  //  10) leaf omitted, non-leaf retained
+  //      (what -momit-leaf-frame-pointer was designed for)
+  //  11) leaf omitted, non-leaf omitted
+  //
+  //  "omit" options taking precedence over "no-omit" options is the only way
+  //  to make 3 valid states representable
+  llvm::opt::Arg *A =
+      Args.getLastArg(clang::driver::options::OPT_fomit_frame_pointer,
+                      clang::driver::options::OPT_fno_omit_frame_pointer);
+
+  bool OmitFP = A && A->getOption().matches(
+                         clang::driver::options::OPT_fomit_frame_pointer);
+  bool NoOmitFP = A && A->getOption().matches(
+                           clang::driver::options::OPT_fno_omit_frame_pointer);
+  bool OmitLeafFP =
+      Args.hasFlag(clang::driver::options::OPT_momit_leaf_frame_pointer,
+                   clang::driver::options::OPT_mno_omit_leaf_frame_pointer,
+                   Triple.isAArch64() || Triple.isPS() || Triple.isVE() ||
+                       (Triple.isAndroid() && Triple.isRISCV64()));
+  if (NoOmitFP || mustUseNonLeafFramePointerForTarget(Triple) ||
+      (!OmitFP && useFramePointerForTargetByDefault(Args, Triple))) {
+    if (OmitLeafFP)
+      return clang::CodeGenOptions::FramePointerKind::NonLeaf;
+    return clang::CodeGenOptions::FramePointerKind::All;
+  }
+  return clang::CodeGenOptions::FramePointerKind::None;
+}
+
 static void renderRpassOptions(const ArgList &Args, ArgStringList &CmdArgs,
                                const StringRef PluginOptPrefix) {
   if (const Arg *A = Args.getLastArg(options::OPT_Rpass_EQ))

diff  --git a/clang/lib/Driver/ToolChains/CommonArgs.h b/clang/lib/Driver/ToolChains/CommonArgs.h
index 0a0951c5386e601..25d68345a9f9ebf 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.h
+++ b/clang/lib/Driver/ToolChains/CommonArgs.h
@@ -9,6 +9,7 @@
 #ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_COMMONARGS_H
 #define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_COMMONARGS_H
 
+#include "clang/Basic/CodeGenOptions.h"
 #include "clang/Driver/Driver.h"
 #include "clang/Driver/InputInfo.h"
 #include "clang/Driver/Multilib.h"
@@ -215,4 +216,7 @@ void addOpenMPDeviceRTL(const Driver &D, const llvm::opt::ArgList &DriverArgs,
 } // end namespace driver
 } // end namespace clang
 
+clang::CodeGenOptions::FramePointerKind
+getFramePointerKind(const llvm::opt::ArgList &Args, const llvm::Triple &Triple);
+
 #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_COMMONARGS_H

diff  --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index 033051b95288a4c..98b337e60e4ffd9 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -9,6 +9,7 @@
 #include "Flang.h"
 #include "CommonArgs.h"
 
+#include "clang/Basic/CodeGenOptions.h"
 #include "clang/Driver/Options.h"
 #include "llvm/Frontend/Debug/Options.h"
 #include "llvm/Support/FileSystem.h"
@@ -674,6 +675,24 @@ void Flang::ConstructJob(Compilation &C, const JobAction &JA,
   // Forward -Xflang arguments to -fc1
   Args.AddAllArgValues(CmdArgs, options::OPT_Xflang);
 
+  CodeGenOptions::FramePointerKind FPKeepKind =
+      getFramePointerKind(Args, Triple);
+
+  const char *FPKeepKindStr = nullptr;
+  switch (FPKeepKind) {
+  case CodeGenOptions::FramePointerKind::None:
+    FPKeepKindStr = "-mframe-pointer=none";
+    break;
+  case CodeGenOptions::FramePointerKind::NonLeaf:
+    FPKeepKindStr = "-mframe-pointer=non-leaf";
+    break;
+  case CodeGenOptions::FramePointerKind::All:
+    FPKeepKindStr = "-mframe-pointer=all";
+    break;
+  }
+  assert(FPKeepKindStr && "unknown FramePointerKind");
+  CmdArgs.push_back(FPKeepKindStr);
+
   // Forward -mllvm options to the LLVM option parser. In practice, this means
   // forwarding to `-fc1` as that's where the LLVM parser is run.
   for (const Arg *A : Args.filtered(options::OPT_mllvm)) {

diff  --git a/flang/test/Driver/driver-help-hidden.f90 b/flang/test/Driver/driver-help-hidden.f90
index 4ea89776416a6b8..f420f1ef3290f67 100644
--- a/flang/test/Driver/driver-help-hidden.f90
+++ b/flang/test/Driver/driver-help-hidden.f90
@@ -74,6 +74,7 @@
 ! CHECK-NEXT: -fno-stack-arrays       Allocate array temporaries on the heap (default)
 ! CHECK-NEXT: -fno-version-loops-for-stride
 ! CHECK-NEXT:                         Do not create unit-strided loops (default)
+! CHECK-NEXT: -fomit-frame-pointer    Omit the frame pointer from functions that don't need it. Some stack unwinding cases, such as profilers and sanitizers, may prefer specifying -fno-omit-frame-pointer. On many targets, -O1 and higher omit the frame pointer by default. -m[no-]omit-leaf-frame-pointer takes precedence for leaf functions
 ! CHECK-NEXT: -fopenacc               Enable OpenACC
 ! CHECK-NEXT: -fopenmp-assume-no-nested-parallelism
 ! CHECK-NEXT:                         Assert no nested parallel regions in the GPU

diff  --git a/flang/test/Driver/driver-help.f90 b/flang/test/Driver/driver-help.f90
index 6fb306d3196fbae..23197e8d489086b 100644
--- a/flang/test/Driver/driver-help.f90
+++ b/flang/test/Driver/driver-help.f90
@@ -64,6 +64,7 @@
 ! HELP-NEXT: -fno-stack-arrays       Allocate array temporaries on the heap (default)
 ! HELP-NEXT: -fno-version-loops-for-stride
 ! HELP-NEXT:                         Do not create unit-strided loops (default)
+! HELP-NEXT: -fomit-frame-pointer    Omit the frame pointer from functions that don't need it. Some stack unwinding cases, such as profilers and sanitizers, may prefer specifying -fno-omit-frame-pointer. On many targets, -O1 and higher omit the frame pointer by default. -m[no-]omit-leaf-frame-pointer takes precedence for leaf functions
 ! HELP-NEXT: -fopenacc               Enable OpenACC
 ! HELP-NEXT: -fopenmp-target-debug   Enable debugging in the OpenMP offloading device RTL
 ! HELP-NEXT: -fopenmp-targets=<value>
@@ -238,6 +239,7 @@
 ! HELP-FC1-NEXT:                         Specify code object ABI version. Defaults to 4. (AMDGPU only)
 ! HELP-FC1-NEXT: -menable-no-infs        Allow optimization to assume there are no infinities.
 ! HELP-FC1-NEXT: -menable-no-nans        Allow optimization to assume there are no NaNs.
+! HELP-FC1-NEXT: -mframe-pointer=<value> Specify which frame pointers to retain.
 ! HELP-FC1-NEXT: -mllvm <value>          Additional arguments to forward to LLVM's option processing
 ! HELP-FC1-NEXT: -mmlir <value>          Additional arguments to forward to MLIR's option processing
 ! HELP-FC1-NEXT: -module-dir <dir>       Put MODULE files in <dir>

diff  --git a/flang/test/Driver/frame-pointer-forwarding.f90 b/flang/test/Driver/frame-pointer-forwarding.f90
new file mode 100644
index 000000000000000..fd615987f82f4c4
--- /dev/null
+++ b/flang/test/Driver/frame-pointer-forwarding.f90
@@ -0,0 +1,9 @@
+! Test that flang-new forwards -fno-omit-frame-pointer and -fomit-frame-pointer Flang frontend
+! RUN: %flang -fno-omit-frame-pointer --target=x86-none-none -fsyntax-only -### %s -o %t 2>&1  | FileCheck %s
+! CHECK: "-mframe-pointer=all"
+
+! RUN: %flang -fno-omit-frame-pointer --target=aarch64-none-none -fsyntax-only -### %s -o %t 2>&1  | FileCheck %s --check-prefix=CHECK-NONLEAFFP
+! CHECK-NONLEAFFP: "-mframe-pointer=non-leaf"
+
+! RUN: %flang -fomit-frame-pointer --target=aarch64-none-none -fsyntax-only -### %s -o %t 2>&1  | FileCheck %s --check-prefix=CHECK-NONEFP
+! CHECK-NONEFP: "-mframe-pointer=none"

diff  --git a/flang/test/Driver/frontend-forwarding.f90 b/flang/test/Driver/frontend-forwarding.f90
index 20455791c9ff4d6..8e9c9b78c3c10a4 100644
--- a/flang/test/Driver/frontend-forwarding.f90
+++ b/flang/test/Driver/frontend-forwarding.f90
@@ -14,6 +14,7 @@
 ! RUN:     -fno-signed-zeros \
 ! RUN:     -fassociative-math \
 ! RUN:     -freciprocal-math \
+! RUN:     -fomit-frame-pointer \
 ! RUN:     -fpass-plugin=Bye%pluginext \
 ! RUN:     -fversion-loops-for-stride \
 ! RUN:     -flang-experimental-polymorphism \
@@ -60,5 +61,6 @@
 ! CHECK: "-Reverything"
 ! CHECK: "-Rno-everything"
 ! CHECK: "-Rpass=inline"
+! CHECK: "-mframe-pointer=none"
 ! CHECK: "-mllvm" "-print-before-all"
 ! CHECK: "-save-temps=obj"


        


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