[llvm] r253528 - [X86] Enable shrink-wrapping by default.

[Quentin Colombet via llvm-commits]

Author: qcolombet
Date: Wed Nov 18 18:38:00 2015
New Revision: 253528

URL: http://llvm.org/viewvc/llvm-project?rev=253528&view=rev
Log:
[X86] Enable shrink-wrapping by default.

Differential Revision: http://reviews.llvm.org/D14156

rdar://problem/21118279

Modified:
    llvm/trunk/lib/Target/X86/X86FrameLowering.h
    llvm/trunk/test/CodeGen/X86/tail-opts.ll

Modified: llvm/trunk/lib/Target/X86/X86FrameLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FrameLowering.h?rev=253528&r1=253527&r2=253528&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FrameLowering.h (original)
+++ llvm/trunk/lib/Target/X86/X86FrameLowering.h Wed Nov 18 18:38:00 2015
@@ -143,6 +143,11 @@ public:
                               MachineBasicBlock::iterator I, 
                               uint64_t Amount) const;
 
+  /// Returns true if the target will correctly handle shrink wrapping.
+  bool enableShrinkWrapping(const MachineFunction &MF) const override {
+    return true;
+  }
+
   /// Wraps up getting a CFI index and building a MachineInstr for it.
   void BuildCFI(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
                 DebugLoc DL, MCCFIInstruction CFIInst) const;

Modified: llvm/trunk/test/CodeGen/X86/tail-opts.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/tail-opts.ll?rev=253528&r1=253527&r2=253528&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/tail-opts.ll (original)
+++ llvm/trunk/test/CodeGen/X86/tail-opts.ll Wed Nov 18 18:38:00 2015
@@ -277,8 +277,8 @@ declare fastcc %union.tree_node* @defaul
 
 ; CHECK-LABEL: foo:
 ; CHECK:        callq func
-; CHECK-NEXT: .LBB4_2:
 ; CHECK-NEXT:   popq
+; CHECK-NEXT: .LBB4_2:
 ; CHECK-NEXT:   ret
 
 define void @foo(i1* %V) nounwind {