[Sparc] Rewrite MBB's live-in registers for leaf functions. Also, add
register i7 as a live-in if current function's return address is taken.
This revision fixes PR16269.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187433 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcFrameLowering.cpp b/lib/Target/Sparc/SparcFrameLowering.cpp
index 7e91bc3..536e466 100644
--- a/lib/Target/Sparc/SparcFrameLowering.cpp
+++ b/lib/Target/Sparc/SparcFrameLowering.cpp
@@ -188,6 +188,17 @@
MRI.setPhysRegUnused(reg);
}
+ // Rewrite MBB's Live-ins.
+ for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
+ MBB != E; ++MBB) {
+ for (unsigned reg = SP::I0; reg <= SP::I7; ++reg) {
+ if (!MBB->isLiveIn(reg))
+ continue;
+ MBB->removeLiveIn(reg);
+ MBB->addLiveIn(reg - SP::I0 + SP::O0);
+ }
+ }
+
assert(verifyLeafProcRegUse(&MRI));
#ifdef XDEBUG
MF.verify(0, "After LeafProc Remapping");