[Sanitizers] Replaced getMaxPointerSizeInBits with getPointerSizeInBi…

…ts, which was causing failures for 32bit x86.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D111829

llvm/lib/Analysis/StackSafetyAnalysis.cpp

@@ -154,7 +154,7 @@ raw_ostream &operator<<(raw_ostream &OS, const UseInfo<CalleeTy> &U) {
 ConstantRange getStaticAllocaSizeRange(const AllocaInst &AI) {
   const DataLayout &DL = AI.getModule()->getDataLayout();
   TypeSize TS = DL.getTypeAllocSize(AI.getAllocatedType());
-  unsigned PointerSize = DL.getMaxPointerSizeInBits();
+  unsigned PointerSize = DL.getPointerTypeSizeInBits(AI.getType());
   // Fallback to empty range for alloca size.
   ConstantRange R = ConstantRange::getEmpty(PointerSize);
   if (TS.isScalable())
@@ -752,10 +752,8 @@ GVToSSI createGlobalStackSafetyInfo(
         KV.second.Calls.clear();
     }
 
-  uint32_t PointerSize = Copy.begin()
-                             ->first->getParent()
-                             ->getDataLayout()
-                             .getMaxPointerSizeInBits();
+  uint32_t PointerSize =
+      Copy.begin()->first->getParent()->getDataLayout().getPointerSizeInBits();
   StackSafetyDataFlowAnalysis<GlobalValue> SSDFA(PointerSize, std::move(Copy));
 
   for (auto &F : SSDFA.run()) {

llvm/test/Analysis/StackSafetyAnalysis/i386-bug-fix.ll

@@ -0,0 +1,24 @@
+; REQUIRES: i386-pc-linux-gnu
+
+; RUN: opt passes="print-stack-safety" -disable-output -mtriple=i386-pc-linux-gnu %s 2>&1 | FileCheck %s --check-prefixes=CHECK
+
+; CHECK:      @main
+; CHECK-NEXT:   args uses:
+; CHECK-NEXT:     argv[]: empty-set
+; CHECK-NEXT:   allocas uses:
+; CHECK-NEXT:     [4]: [0,4)
+; CHECK-NEXT:     [32]: full-set
+; CHECK-NEXT:   safe accesses:
+
+target datalayout = "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128"
+target triple = "i386-pc-linux-gnu"
+
+; Function Attrs: mustprogress norecurse sanitize_address uwtable
+define dso_local i32 @main(i32 %argc, i8** %argv)  {
+entry:
+  %0 = alloca i32, align 4
+  %1 = alloca i8, i64 32, align 32
+  %2 = ptrtoint i8* %1 to i32
+  store i32 %2, i32* %0, align 4
+  ret i32 0
+}