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| author | Evan Cheng <evan.cheng@apple.com> | 2010-08-10 19:30:19 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-08-10 19:30:19 +0000 |
| commit | ac096808a3accc516ae7c193c9a2c1392bf3301a (patch) | |
| tree | 7add14add83e0e065548a9ad801a591251ca6a83 /lib/Target/ARM/ARMMachineFunctionInfo.h | |
| parent | 98197e55c10176c3ef9100f7d852abbd2347225f (diff) | |
| download | llvm-ac096808a3accc516ae7c193c9a2c1392bf3301a.tar.gz llvm-ac096808a3accc516ae7c193c9a2c1392bf3301a.tar.bz2 llvm-ac096808a3accc516ae7c193c9a2c1392bf3301a.tar.xz | |
Re-apply r110655 with fixes. Epilogue must restore sp from fp if the function stack frame has a var-sized object.
Also added a test case to check for the added benefit of this patch: it's optimizing away the unnecessary restore of sp from fp for some non-leaf functions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110707 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM/ARMMachineFunctionInfo.h')
| -rw-r--r-- | lib/Target/ARM/ARMMachineFunctionInfo.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/Target/ARM/ARMMachineFunctionInfo.h b/lib/Target/ARM/ARMMachineFunctionInfo.h index 7e57a1ca55..514c26b4da 100644 --- a/lib/Target/ARM/ARMMachineFunctionInfo.h +++ b/lib/Target/ARM/ARMMachineFunctionInfo.h @@ -43,6 +43,10 @@ class ARMFunctionInfo : public MachineFunctionInfo { /// processFunctionBeforeCalleeSavedScan(). bool HasStackFrame; + /// RestoreSPFromFP - True if epilogue should restore SP from FP. Set by + /// emitPrologue. + bool RestoreSPFromFP; + /// LRSpilledForFarJump - True if the LR register has been for spilled to /// enable far jump. bool LRSpilledForFarJump; @@ -95,7 +99,7 @@ public: ARMFunctionInfo() : isThumb(false), hasThumb2(false), - VarArgsRegSaveSize(0), HasStackFrame(false), + VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), LRSpilledForFarJump(false), FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), @@ -106,7 +110,7 @@ public: explicit ARMFunctionInfo(MachineFunction &MF) : isThumb(MF.getTarget().getSubtarget<ARMSubtarget>().isThumb()), hasThumb2(MF.getTarget().getSubtarget<ARMSubtarget>().hasThumb2()), - VarArgsRegSaveSize(0), HasStackFrame(false), + VarArgsRegSaveSize(0), HasStackFrame(false), RestoreSPFromFP(false), LRSpilledForFarJump(false), FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0), GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0), @@ -125,6 +129,9 @@ public: bool hasStackFrame() const { return HasStackFrame; } void setHasStackFrame(bool s) { HasStackFrame = s; } + bool shouldRestoreSPFromFP() const { return RestoreSPFromFP; } + void setShouldRestoreSPFromFP(bool s) { RestoreSPFromFP = s; } + bool isLRSpilledForFarJump() const { return LRSpilledForFarJump; } void setLRIsSpilledForFarJump(bool s) { LRSpilledForFarJump = s; } |