[Inline] Remove bitcast handling in CallAnalyzer::stripAndComputeInBoundsConstantOffsets (#97988)

As we are now using opaque pointers, bitcast handling is no longer
needed.

Closes #97590.

Author: dtcxzyw

llvm/lib/Analysis/InlineCost.cpp

@@ -2644,8 +2644,6 @@ ConstantInt *CallAnalyzer::stripAndComputeInBoundsConstantOffsets(Value *&V) {
       if (!GEP->isInBounds() || !accumulateGEPOffset(*GEP, Offset))
         return nullptr;
       V = GEP->getPointerOperand();
-    } else if (Operator::getOpcode(V) == Instruction::BitCast) {
-      V = cast<Operator>(V)->getOperand(0);
     } else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
       if (GA->isInterposable())
         break;

llvm/test/Transforms/Inline/pr97590.ll

@@ -0,0 +1,28 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -passes=inline < %s | FileCheck %s
+
+; Check that we don't crash when computing the
+; base pointer of `bitcast <1 x ptr> to ptr`
+
+define void @caller(<1 x ptr> %x) {
+; CHECK-LABEL: define void @caller(
+; CHECK-SAME: <1 x ptr> [[X:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    [[P:%.*]] = bitcast <1 x ptr> [[X]] to ptr
+; CHECK-NEXT:    ret void
+;
+entry:
+  %p = bitcast <1 x ptr> %x to ptr
+  call void @callee(ptr %p)
+  ret void
+}
+
+define void @callee(ptr %p) {
+; CHECK-LABEL: define void @callee(
+; CHECK-SAME: ptr [[P:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    ret void
+;
+entry:
+  ret void
+}