[PATCH] D55915: [Driver] Make -fno-omit-frame-pointer imply -mno-omit-leaf-frame-pointerand make -fomit-frame-pointer imply -momit-leaf-frame-pointer.This matches GCC's behavior.

[Yuanfang Chen via Phabricator via cfe-commits]

tabloid.adroit created this revision.
Herald added a subscriber: cfe-commits.

llvm.org/PR9825


Repository:
  rC Clang

https://reviews.llvm.org/D55915

Files:
  lib/CodeGen/CGCall.cpp
  lib/Driver/ToolChains/Clang.cpp
  test/Driver/cl-options.c
  test/Driver/frame-pointer-elim.c


Index: test/Driver/frame-pointer-elim.c
===================================================================
--- test/Driver/frame-pointer-elim.c
+++ test/Driver/frame-pointer-elim.c
@@ -69,5 +69,20 @@
 // RUN: %clang -### -target x86_64-scei-ps4 -S -O2 %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=OMIT_LEAF %s
 
+// RUN: %clang -### -S -Os -fno-omit-frame-pointer %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=NO-OMIT-ALL %s
+// NO-OMIT-ALL: "-mdisable-fp-elim"
+// NO-OMIT-ALL-NOT: "-momit-leaf-frame-pointer"
+
+// RUN: %clang -### -S -Os -fno-omit-frame-pointer -momit-leaf-frame-pointer %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=NO-OMIT-NONLEAF %s
+// NO-OMIT-NONLEAF: "-mdisable-fp-elim"
+// NO-OMIT-NONLEAF: "-momit-leaf-frame-pointer"
+
+// RUN: %clang -### -S -Os -fomit-frame-pointer %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=OMIT-ALL %s
+// OMIT-ALL-NOT: "-mdisable-fp-elim"
+// OMIT-ALL: "-momit-leaf-frame-pointer"
+
 void f0() {}
 void f1() { f0(); }
Index: test/Driver/cl-options.c
===================================================================
--- test/Driver/cl-options.c
+++ test/Driver/cl-options.c
@@ -171,11 +171,10 @@
 
 // RUN: %clang_cl --target=i686-pc-win32 /O2sy- -### -- %s 2>&1 | FileCheck -check-prefix=PR24003 %s
 // PR24003: -mdisable-fp-elim
-// PR24003: -momit-leaf-frame-pointer
 // PR24003: -Os
 
 // RUN: %clang_cl --target=i686-pc-win32 -Werror /Oy- /O2 -### -- %s 2>&1 | FileCheck -check-prefix=Oy_2 %s
-// Oy_2: -momit-leaf-frame-pointer
+// Oy_2: -mdisable-fp-elim
 // Oy_2: -O2
 
 // RUN: %clang_cl --target=i686-pc-win32 -Werror /O2 /O2 -### -- %s 2>&1 | FileCheck -check-prefix=O2O2 %s
Index: lib/Driver/ToolChains/Clang.cpp
===================================================================
--- lib/Driver/ToolChains/Clang.cpp
+++ lib/Driver/ToolChains/Clang.cpp
@@ -498,7 +498,7 @@
   return codegenoptions::LimitedDebugInfo;
 }
 
-static bool mustUseNonLeafFramePointerForTarget(const llvm::Triple &Triple) {
+static bool mustUseFramePointerForTarget(const llvm::Triple &Triple) {
   switch (Triple.getArch()){
   default:
     return false;
@@ -575,7 +575,7 @@
   if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer,
                                options::OPT_fomit_frame_pointer))
     return A->getOption().matches(options::OPT_fno_omit_frame_pointer) ||
-           mustUseNonLeafFramePointerForTarget(Triple);
+           mustUseFramePointerForTarget(Triple);
 
   if (Args.hasArg(options::OPT_pg))
     return true;
@@ -589,6 +589,11 @@
                                options::OPT_momit_leaf_frame_pointer))
     return A->getOption().matches(options::OPT_mno_omit_leaf_frame_pointer);
 
+  if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer,
+                               options::OPT_fomit_frame_pointer))
+    return A->getOption().matches(options::OPT_fno_omit_frame_pointer) ||
+           mustUseFramePointerForTarget(Triple);
+
   if (Args.hasArg(options::OPT_pg))
     return true;
 
Index: lib/CodeGen/CGCall.cpp
===================================================================
--- lib/CodeGen/CGCall.cpp
+++ lib/CodeGen/CGCall.cpp
@@ -1736,7 +1736,6 @@
       FuncAttrs.addAttribute("no-frame-pointer-elim-non-leaf");
     } else {
       FuncAttrs.addAttribute("no-frame-pointer-elim", "true");
-      FuncAttrs.addAttribute("no-frame-pointer-elim-non-leaf");
     }
 
     FuncAttrs.addAttribute("less-precise-fpmad",


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