- if (const CastInst *CI = dyn_cast<CastInst>(I)) {
- // Noop casts, including ptr <-> int, don't count.
- if (CI->isLosslessCast())
- return true;
-
- Value *Op = CI->getOperand(0);
- // An inttoptr cast is free so long as the input is a legal integer type
- // which doesn't contain values outside the range of a pointer.
- if (isa<IntToPtrInst>(CI) && TD &&
- TD->isLegalInteger(Op->getType()->getScalarSizeInBits()) &&
- Op->getType()->getScalarSizeInBits() <= TD->getPointerSizeInBits(
- cast<IntToPtrInst>(CI)->getAddressSpace()))
- return true;
-
- // A ptrtoint cast is free so long as the result is large enough to store
- // the pointer, and a legal integer type.
- if (isa<PtrToIntInst>(CI) && TD &&
- TD->isLegalInteger(Op->getType()->getScalarSizeInBits()) &&
- Op->getType()->getScalarSizeInBits() >= TD->getPointerSizeInBits(
- cast<PtrToIntInst>(CI)->getPointerAddressSpace()))
- return true;
-
- // trunc to a native type is free (assuming the target has compare and
- // shift-right of the same width).
- if (TD && isa<TruncInst>(CI) &&
- TD->isLegalInteger(TD->getTypeSizeInBits(CI->getType())))
- return true;
- // Result of a cmp instruction is often extended (to be used by other
- // cmp instructions, logical or return instructions). These are usually
- // nop on most sane targets.
- if (isa<CmpInst>(CI->getOperand(0)))
- return true;
+ completeEphemeralValues(WorkSet, EphValues);
+}
+
+void CodeMetrics::collectEphemeralValues(
+ const Function *F, AssumptionCache *AC,
+ SmallPtrSetImpl<const Value *> &EphValues) {
+ SmallVector<const Value *, 16> WorkSet;
+
+ for (auto &AssumeVH : AC->assumptions()) {
+ if (!AssumeVH)
+ continue;
+ Instruction *I = cast<Instruction>(AssumeVH);
+ assert(I->getParent()->getParent() == F &&
+ "Found assumption for the wrong function!");
+ WorkSet.push_back(I);