Interprocedural Register Allocation (IPRA): add a Transformation Pass
Adds a MachineFunctionPass that scans the body to find calls, and
update the register mask with the one saved by the
RegUsageInfoCollector analysis in PhysicalRegisterUsageInfo.
Patch by Vivek Pandya <vivekvpandya@gmail.com>
Differential Revision: http://reviews.llvm.org/D21180
llvm-svn: 272414
diff --git a/llvm/lib/CodeGen/TargetPassConfig.cpp b/llvm/lib/CodeGen/TargetPassConfig.cpp
index 3e7261a..1b30cc8 100644
--- a/llvm/lib/CodeGen/TargetPassConfig.cpp
+++ b/llvm/lib/CodeGen/TargetPassConfig.cpp
@@ -538,6 +538,9 @@
void TargetPassConfig::addMachinePasses() {
AddingMachinePasses = true;
+ if (UseIPRA)
+ addPass(createRegUsageInfoPropPass());
+
// Insert a machine instr printer pass after the specified pass.
if (!StringRef(PrintMachineInstrs.getValue()).equals("") &&
!StringRef(PrintMachineInstrs.getValue()).equals("option-unspecified")) {