--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/llvm/test/Transforms/SROA/pr26972.ll	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,17 @@
+; RUN: opt < %s -sroa -S | FileCheck %s
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-linux"
+
+; Make sure we properly handle allocas where the allocated
+; size overflows a uint32_t. This specific constant results in
+; the size in bits being 32 after truncation to a 32-bit int.
+; CHECK-LABEL: fn1
+; CHECK-NEXT: ret void
+define void @fn1() {
+  %a = alloca [1073741825 x i32], align 16
+  %t0 = bitcast [1073741825 x i32]* %a to i8*
+  call void @llvm.lifetime.end.p0i8(i64 4294967300, i8* %t0)
+  ret void
+}
+
+declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)