r358245 - Enable frame pointer elimination for OpenBSD on x86 and mips64.

[Brad Smith via cfe-commits]

Author: brad
Date: Thu Apr 11 18:29:18 2019
New Revision: 358245

URL: http://llvm.org/viewvc/llvm-project?rev=358245&view=rev
Log:
Enable frame pointer elimination for OpenBSD on x86 and mips64.

Modified:
    cfe/trunk/lib/Driver/ToolChains/Clang.cpp
    cfe/trunk/test/Driver/frame-pointer-elim.c

Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Clang.cpp?rev=358245&r1=358244&r2=358245&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains/Clang.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Clang.cpp Thu Apr 11 18:29:18 2019
@@ -534,6 +534,18 @@ static bool useFramePointerForTargetByDe
     return !areOptimizationsEnabled(Args);
   }
 
+  if (Triple.isOSOpenBSD()) {
+    switch (Triple.getArch()) {
+    case llvm::Triple::mips64:
+    case llvm::Triple::mips64el:
+    case llvm::Triple::x86:
+    case llvm::Triple::x86_64:
+      return !areOptimizationsEnabled(Args);
+    default:
+      return true;
+    }
+  }
+
   if (Triple.isOSLinux() || Triple.getOS() == llvm::Triple::CloudABI ||
       Triple.isOSHurd()) {
     switch (Triple.getArch()) {

Modified: cfe/trunk/test/Driver/frame-pointer-elim.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/frame-pointer-elim.c?rev=358245&r1=358244&r2=358245&view=diff
==============================================================================
--- cfe/trunk/test/Driver/frame-pointer-elim.c (original)
+++ cfe/trunk/test/Driver/frame-pointer-elim.c Thu Apr 11 18:29:18 2019
@@ -26,6 +26,15 @@
 // RUN:   FileCheck --check-prefix=NETBSD %s
 // NETBSD-NOT: "-momit-leaf-frame-pointer"
 
+// OpenBSD follows the same rules as Linux.
+// RUN: %clang -### -target x86_64-unknown-openbsd -S -O1 %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=OPENBSD-OPT %s
+// OPENBSD-OPT: "-momit-leaf-frame-pointer"
+
+// RUN: %clang -### -target x86_64-unknown-openbsd -S %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=OPENBSD %s
+// OPENBSD-NOT: "-momit-leaf-frame-pointer"
+
 // Darwin disables omitting the leaf frame pointer even under optimization
 // unless the command lines are given.
 // RUN: %clang -### -target i386-apple-darwin -S %s 2>&1 | \