[SystemZ] Enable frame-pointer elimination for -O1 and above

Copies the x86 behavior.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186674 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 87fbcd7688a4d9be926273fb1b7e490eb20c80f8..8df0578e7d9e13259df7a992fdfbaa34924276bf 100644 (file)
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1799,9 +1799,10 @@ static bool shouldUseFramePointer(const ArgList &Args,
                                options::OPT_fomit_frame_pointer))
     return A->getOption().matches(options::OPT_fno_omit_frame_pointer);
 
-  // Don't use a frame pointer on linux x86 and x86_64 if optimizing.
+  // Don't use a frame pointer on linux x86, x86_64 and z if optimizing.
   if ((Triple.getArch() == llvm::Triple::x86_64 ||
-       Triple.getArch() == llvm::Triple::x86) &&
+       Triple.getArch() == llvm::Triple::x86 ||
+       Triple.getArch() == llvm::Triple::systemz) &&
       Triple.getOS() == llvm::Triple::Linux) {
     if (Arg *A = Args.getLastArg(options::OPT_O_Group))
       if (!A->getOption().matches(options::OPT_O0))
@@ -1817,9 +1818,10 @@ static bool shouldUseLeafFramePointer(const ArgList &Args,
                                options::OPT_momit_leaf_frame_pointer))
     return A->getOption().matches(options::OPT_mno_omit_leaf_frame_pointer);
 
-  // Don't use a leaf frame pointer on linux x86 and x86_64 if optimizing.
+  // Don't use a leaf frame pointer on linux x86, x86_64 and z if optimizing.
   if ((Triple.getArch() == llvm::Triple::x86_64 ||
-       Triple.getArch() == llvm::Triple::x86) &&
+       Triple.getArch() == llvm::Triple::x86 ||
+       Triple.getArch() == llvm::Triple::systemz) &&
       Triple.getOS() == llvm::Triple::Linux) {
     if (Arg *A = Args.getLastArg(options::OPT_O_Group))
       if (!A->getOption().matches(options::OPT_O0))

diff --git a/test/Driver/frame-pointer.c b/test/Driver/frame-pointer.c
index 6be395c598801c245a41a6456d1949ca89bf4226..027077ca5f1bd3bf09c1cea53163cbed095d6b88 100644 (file)
--- a/test/Driver/frame-pointer.c
+++ b/test/Driver/frame-pointer.c
@@ -11,6 +11,11 @@
 // RUN: %clang -target x86_64-pc-linux -### -S -O3 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK3-64 %s
 // RUN: %clang -target x86_64-pc-linux -### -S -Os %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECKs-64 %s
 
+// Trust the above to get the optimizations right, and just test other targets
+// that want this by default.
+// RUN: %clang -target s390x-pc-linux -### -S -O0 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK0-64 %s
+// RUN: %clang -target s390x-pc-linux -### -S -O1 %s -o %t.s 2>&1 | FileCheck -check-prefix=CHECK1-64 %s
+
 // CHECK0-32: -mdisable-fp-elim
 // CHECK1-32-NOT: -mdisable-fp-elim
 // CHECK2-32-NOT: -mdisable-fp-elim