[VE] Change to omitting the frame pointer on leaf functions

[kaz7]

Summary

Change to omitting the frame pointer on leaf functions by default for VE.

clang/lib/Driver/ToolChains/Clang.cpp

getFramePointerKind(const ArgList &Args, const llvm::Triple &Triple) {
   //  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.isPS4CPU());
+                                 Triple.isAArch64() || Triple.isPS4CPU() ||
+                                 Triple.isVE());
   if (NoOmitFP || mustUseNonLeafFramePointerForTarget(Triple) ||
       (!OmitFP && useFramePointerForTargetByDefault(Args, Triple))) {
     if (OmitLeafFP)
       return CodeGenOptions::FramePointerKind::NonLeaf;
     return CodeGenOptions::FramePointerKind::All;
   }
   return CodeGenOptions::FramePointerKind::None;
 }

clang/test/Driver/frame-pointer-elim.c

 // WARN-OMIT-7K: warning: optimization flag '-fomit-frame-pointer' is not supported for target 'armv7k'
 // WARN-OMIT-7K: "-mframe-pointer=all"
 
 // RUN: %clang -### -target armv7s-apple-ios8.0 -momit-leaf-frame-pointer %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=WARN-OMIT-LEAF-7S %s
 // WARN-OMIT-LEAF-7S-NOT: warning: optimization flag '-momit-leaf-frame-pointer' is not supported for target 'armv7s'
 // WARN-OMIT-LEAF-7S: "-mframe-pointer=non-leaf"
 
-// On AArch64 and PS4, default to omitting the frame pointer on leaf functions
+// On AArch64, PS4, and VE, default to omitting the frame pointer on leaf
+// functions
 // RUN: %clang -### -target aarch64 -S %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 // RUN: %clang -### -target x86_64-scei-ps4 -S %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 // RUN: %clang -### -target x86_64-scei-ps4 -S -O2 %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 // RUN: %clang -### -target aarch64-apple-darwin -arch arm64_32 -S %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
+// RUN: %clang -### -target ve-unknown-linux-gnu -S %s 2>&1 | \
+// RUN:   FileCheck --check-prefix=KEEP-NON-LEAF %s
 
 // RUN: %clang -### -target powerpc64 -S %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-ALL %s
 // RUN: %clang -### -target powerpc64 -S -O1 %s 2>&1 | \
 // RUN:   FileCheck --check-prefix=KEEP-NONE %s
 
 // For AAarch32 (A32, T32) linux targets, default omit frame pointer when
 // optimizations are enabled.