1; Test kernel hwasan instrumentation for alloca. 2; 3; RUN: opt < %s -hwasan -hwasan-kernel=1 -S | FileCheck %s 4 5target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" 6target triple = "aarch64--linux-android" 7 8declare void @use32(i32*) 9 10define void @test_alloca() sanitize_hwaddress { 11; CHECK-LABEL: @test_alloca( 12; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress(i32 0) 13; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64 14; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20 15; CHECK: %[[BASE_TAG:[^ ]*]] = xor i64 %[[A]], %[[B]] 16 17; CHECK: %[[X:[^ ]*]] = alloca i32, align 16 18; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0 19; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X]] to i64 20; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 56 21; CHECK: %[[D:[^ ]*]] = or i64 %[[C]], 72057594037927935 22; CHECK: %[[E:[^ ]*]] = and i64 %[[X1]], %[[D]] 23; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[E]] to i32* 24 25entry: 26 %x = alloca i32, align 4 27 call void @use32(i32* nonnull %x) 28 ret void 29} 30