[InstCombine] Remove unused entries in gc-live bundle of statepoint

If some of gc live value are not used in gc.relocate we can remove them
from gc-live bundle of statepoint instruction.

Also the CL removes duplicated Values in gc-live bundle.

Reviewers: reames, dantrushin
Reviewed By: dantrushin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D85959

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/lib/IR/Instructions.cpp b/llvm/lib/IR/Instructions.cpp
index 7a3fbc36..763b1f5 100644
--- a/llvm/lib/IR/Instructions.cpp
+++ b/llvm/lib/IR/Instructions.cpp
@@ -515,6 +515,18 @@ CallInst *CallInst::Create(CallInst *CI, ArrayRef<OperandBundleDef> OpB,
   return NewCI;
 }
 
+CallInst *CallInst::CreateWithReplacedBundle(CallInst *CI, OperandBundleDef OpB,
+                                             Instruction *InsertPt) {
+  SmallVector<OperandBundleDef, 2> OpDefs;
+  for (unsigned i = 0, e = CI->getNumOperandBundles(); i < e; ++i) {
+    auto ChildOB = CI->getOperandBundleAt(i);
+    if (ChildOB.getTagName() != OpB.getTag())
+      OpDefs.emplace_back(ChildOB);
+  }
+  OpDefs.emplace_back(OpB);
+  return CallInst::Create(CI, OpDefs, InsertPt);
+}
+
 // Update profile weight for call instruction by scaling it using the ratio
 // of S/T. The meaning of "branch_weights" meta data for call instruction is
 // transfered to represent call count.
@@ -826,6 +838,18 @@ InvokeInst *InvokeInst::Create(InvokeInst *II, ArrayRef<OperandBundleDef> OpB,
   return NewII;
 }
 
+InvokeInst *InvokeInst::CreateWithReplacedBundle(InvokeInst *II,
+                                                 OperandBundleDef OpB,
+                                                 Instruction *InsertPt) {
+  SmallVector<OperandBundleDef, 2> OpDefs;
+  for (unsigned i = 0, e = II->getNumOperandBundles(); i < e; ++i) {
+    auto ChildOB = II->getOperandBundleAt(i);
+    if (ChildOB.getTagName() != OpB.getTag())
+      OpDefs.emplace_back(ChildOB);
+  }
+  OpDefs.emplace_back(OpB);
+  return InvokeInst::Create(II, OpDefs, InsertPt);
+}
 
 LandingPadInst *InvokeInst::getLandingPadInst() const {
   return cast<LandingPadInst>(getUnwindDest()->getFirstNonPHI());