vendor/llvm/llvm-trunk-r338150

1 files changed, 13 insertions, 2 deletions

diff --git a/lib/Target/PowerPC/PPCMachineFunctionInfo.h b/lib/Target/PowerPC/PPCMachineFunctionInfo.h
index a9b6073106ea..b14bbad2039a 100644
--- a/lib/Target/PowerPC/PPCMachineFunctionInfo.h
+++ b/lib/Target/PowerPC/PPCMachineFunctionInfo.h
@@ -45,6 +45,11 @@ class PPCFunctionInfo : public MachineFunctionInfo {
   /// PEI.
   bool MustSaveLR;
 
+  /// Do we have to disable shrink-wrapping? This has to be set if we emit any
+  /// instructions that clobber LR in the entry block because discovering this
+  /// in PEI is too late (happens after shrink-wrapping);
+  bool ShrinkWrapDisabled = false;
+
   /// Does this function have any stack spills.
   bool HasSpills = false;
 
@@ -147,6 +152,12 @@ public:
   void setMustSaveLR(bool U) { MustSaveLR = U; }
   bool mustSaveLR() const    { return MustSaveLR; }
 
+  /// We certainly don't want to shrink wrap functions if we've emitted a
+  /// MovePCtoLR8 as that has to go into the entry, so the prologue definitely
+  /// has to go into the entry block.
+  void setShrinkWrapDisabled(bool U) { ShrinkWrapDisabled = U; }
+  bool shrinkWrapDisabled() const { return ShrinkWrapDisabled; }
+
   void setHasSpills()      { HasSpills = true; }
   bool hasSpills() const   { return HasSpills; }
 
@@ -185,11 +196,11 @@ public:
     LiveInAttrs.push_back(std::make_pair(VReg, Flags));
   }
 
-  /// This function returns true if the spesified vreg is
+  /// This function returns true if the specified vreg is
   /// a live-in register and sign-extended.
   bool isLiveInSExt(unsigned VReg) const;
 
-  /// This function returns true if the spesified vreg is
+  /// This function returns true if the specified vreg is
   /// a live-in register and zero-extended.
   bool isLiveInZExt(unsigned VReg) const;