reapply r101434
with a fix for self-hosting
rotate CallInst operands, i.e. move callee to the back
of the operand array
the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101465 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp
index af9ec5c..1293de8 100644
--- a/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -711,7 +711,7 @@
}
Instruction *InstCombiner::visitFree(Instruction &FI) {
- Value *Op = FI.getOperand(1);
+ Value *Op = FI.getOperand(0);
// free undef -> unreachable.
if (isa<UndefValue>(Op)) {
@@ -896,7 +896,7 @@
if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(Agg)) {
// We're extracting from an intrinsic, see if we're the only user, which
// allows us to simplify multiple result intrinsics to simpler things that
- // just get one value..
+ // just get one value.
if (II->hasOneUse()) {
// Check if we're grabbing the overflow bit or the result of a 'with
// overflow' intrinsic. If it's the latter we can remove the intrinsic
@@ -905,7 +905,7 @@
case Intrinsic::uadd_with_overflow:
case Intrinsic::sadd_with_overflow:
if (*EV.idx_begin() == 0) { // Normal result.
- Value *LHS = II->getOperand(1), *RHS = II->getOperand(2);
+ Value *LHS = II->getOperand(0), *RHS = II->getOperand(1);
II->replaceAllUsesWith(UndefValue::get(II->getType()));
EraseInstFromFunction(*II);
return BinaryOperator::CreateAdd(LHS, RHS);
@@ -914,7 +914,7 @@
case Intrinsic::usub_with_overflow:
case Intrinsic::ssub_with_overflow:
if (*EV.idx_begin() == 0) { // Normal result.
- Value *LHS = II->getOperand(1), *RHS = II->getOperand(2);
+ Value *LHS = II->getOperand(0), *RHS = II->getOperand(1);
II->replaceAllUsesWith(UndefValue::get(II->getType()));
EraseInstFromFunction(*II);
return BinaryOperator::CreateSub(LHS, RHS);
@@ -923,7 +923,7 @@
case Intrinsic::umul_with_overflow:
case Intrinsic::smul_with_overflow:
if (*EV.idx_begin() == 0) { // Normal result.
- Value *LHS = II->getOperand(1), *RHS = II->getOperand(2);
+ Value *LHS = II->getOperand(0), *RHS = II->getOperand(1);
II->replaceAllUsesWith(UndefValue::get(II->getType()));
EraseInstFromFunction(*II);
return BinaryOperator::CreateMul(LHS, RHS);