AArch64: Use TTI branch functions in branch relaxation
The main change is to return the code size from
InsertBranch/RemoveBranch.
Patch mostly by Tim Northover
llvm-svn: 281505
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
index 4cdc872..9e6d43f 100644
--- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -363,7 +363,10 @@
return false;
}
-unsigned SystemZInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
+unsigned SystemZInstrInfo::RemoveBranch(MachineBasicBlock &MBB,
+ int *BytesRemoved) const {
+ assert(!BytesRemoved && "code size not handled");
+
// Most of the code and comments here are boilerplate.
MachineBasicBlock::iterator I = MBB.end();
unsigned Count = 0;
@@ -396,7 +399,8 @@
MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
ArrayRef<MachineOperand> Cond,
- const DebugLoc &DL) const {
+ const DebugLoc &DL,
+ int *BytesAdded) const {
// In this function we output 32-bit branches, which should always
// have enough range. They can be shortened and relaxed by later code
// in the pipeline, if desired.
@@ -405,6 +409,7 @@
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
assert((Cond.size() == 2 || Cond.size() == 0) &&
"SystemZ branch conditions have one component!");
+ assert(!BytesAdded && "code size not handled");
if (Cond.empty()) {
// Unconditional branch?