[PATCH] D42358: [X86][x32] Save callee-save register used as base pointer for x32 ABI

[Derek Schuff via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL326593: [X86][x32] Save callee-save register used as base pointer for x32 ABI (authored by dschuff, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D42358?vs=130827&id=136779#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D42358

Files:
  llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
  llvm/trunk/test/CodeGen/X86/x86-64-baseptr.ll


Index: llvm/trunk/test/CodeGen/X86/x86-64-baseptr.ll
===================================================================
--- llvm/trunk/test/CodeGen/X86/x86-64-baseptr.ll
+++ llvm/trunk/test/CodeGen/X86/x86-64-baseptr.ll
@@ -39,6 +39,7 @@
 ; X32ABI:       # %bb.0: # %entry
 ; X32ABI-NEXT:    pushq %rbp
 ; X32ABI-NEXT:    movl %esp, %ebp
+; X32ABI-NEXT:    pushq  %rbx
 ; X32ABI-NEXT:    andl $-32, %esp
 ; X32ABI-NEXT:    subl $32, %esp
 ; X32ABI-NEXT:    movl %esp, %ebx
@@ -52,7 +53,8 @@
 ; X32ABI-NEXT:    movl %edx, %esp
 ; X32ABI-NEXT:    negl %eax
 ; X32ABI-NEXT:    movl $0, (%ecx,%eax)
-; X32ABI-NEXT:    movl %ebp, %esp
+; X32ABI-NEXT:    leal -8(%ebp), %esp
+; X32ABI-NEXT:    popq %rbx
 ; X32ABI-NEXT:    popq %rbp
 ; X32ABI-NEXT:    retq
 entry:
Index: llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
===================================================================
--- llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
+++ llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
@@ -2108,8 +2108,12 @@
   TargetFrameLowering::determineCalleeSaves(MF, SavedRegs, RS);
 
   // Spill the BasePtr if it's used.
-  if (TRI->hasBasePointer(MF))
-    SavedRegs.set(TRI->getBaseRegister());
+  if (TRI->hasBasePointer(MF)){
+    unsigned BasePtr = TRI->getBaseRegister();
+    if (STI.isTarget64BitILP32())
+      BasePtr = getX86SubSuperRegister(BasePtr, 64);
+    SavedRegs.set(BasePtr);
+  }
 }
 
 static bool


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