switch a private implementation of GetFunctionSizeInBytes.
This is probably not the best way to implement "Force LR to
be spilled if the Thumb function size is > 2048." do this,
it should use the branch shortening infrastructure, but I'm
just preserving functionality here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109165 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
index 29b8fd4..31439b4 100644
--- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
@@ -723,6 +723,19 @@
return Limit;
}
+static unsigned GetFunctionSizeInBytes(const MachineFunction &MF,
+ const ARMBaseInstrInfo &TII) {
+ unsigned FnSize = 0;
+ for (MachineFunction::const_iterator MBBI = MF.begin(), E = MF.end();
+ MBBI != E; ++MBBI) {
+ const MachineBasicBlock &MBB = *MBBI;
+ for (MachineBasicBlock::const_iterator I = MBB.begin(),E = MBB.end();
+ I != E; ++I)
+ FnSize += TII.GetInstSizeInBytes(I);
+ }
+ return FnSize;
+}
+
void
ARMBaseRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
RegScavenger *RS) const {
@@ -820,7 +833,7 @@
bool ForceLRSpill = false;
if (!LRSpilled && AFI->isThumb1OnlyFunction()) {
- unsigned FnSize = TII.GetFunctionSizeInBytes(MF);
+ unsigned FnSize = GetFunctionSizeInBytes(MF, TII);
// Force LR to be spilled if the Thumb function size is > 2048. This enables
// use of BL to implement far jump. If it turns out that it's not needed
// then the branch fix up path will undo it.