1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --tool build/bin/opt --version 5 2; RUN: opt < %s -S -passes="msan<eager-checks;track-origins=2>" -msan-instrumentation-with-call-threshold=0 | FileCheck %s 3; 4; This test illustrates a bug in MemorySanitizer that will shortly be fixed 5; (https://github.com/llvm/llvm-project/pull/96722). 6; 7; '-msan-instrumentation-with-call-threshold=0' makes it possible to detect the 8; bug with a short test case. 9; 10; This is based on check-struct.ll. 11 12target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 13target triple = "x86_64-unknown-linux-gnu" 14 15define { i32, i8 } @main() sanitize_memory { 16; CHECK-LABEL: define { i32, i8 } @main( 17; CHECK-SAME: ) #[[ATTR0:[0-9]+]] { 18; CHECK-NEXT: call void @llvm.donothing() 19; CHECK-NEXT: [[P:%.*]] = inttoptr i64 0 to ptr 20; CHECK-NEXT: [[O:%.*]] = load { i32, i8 }, ptr [[P]], align 4 21; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint ptr [[P]] to i64 22; CHECK-NEXT: [[TMP2:%.*]] = xor i64 [[TMP1]], 87960930222080 23; CHECK-NEXT: [[TMP3:%.*]] = inttoptr i64 [[TMP2]] to ptr 24; CHECK-NEXT: [[TMP4:%.*]] = add i64 [[TMP2]], 17592186044416 25; CHECK-NEXT: [[TMP5:%.*]] = inttoptr i64 [[TMP4]] to ptr 26; CHECK-NEXT: [[_MSLD:%.*]] = load { i32, i8 }, ptr [[TMP3]], align 4 27; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[TMP5]], align 4 28; CHECK-NEXT: store { i32, i8 } zeroinitializer, ptr @__msan_retval_tls, align 8 29; CHECK-NEXT: [[TMP7:%.*]] = extractvalue { i32, i8 } [[_MSLD]], 0 30; CHECK-NEXT: [[TMP8:%.*]] = icmp ne i32 [[TMP7]], 0 31; CHECK-NEXT: [[TMP9:%.*]] = extractvalue { i32, i8 } [[_MSLD]], 1 32; CHECK-NEXT: [[TMP10:%.*]] = icmp ne i8 [[TMP9]], 0 33; CHECK-NEXT: [[TMP11:%.*]] = or i1 [[TMP8]], [[TMP10]] 34; CHECK-NEXT: [[TMP12:%.*]] = zext i1 [[TMP11]] to i64 35; CHECK-NEXT: call void @__msan_maybe_warning_8(i64 zeroext [[TMP12]], i32 zeroext [[TMP6]]) 36; CHECK-NEXT: ret { i32, i8 } [[O]] 37; 38 %p = inttoptr i64 0 to ptr 39 %o = load { i32, i8 }, ptr %p 40 ret { i32, i8 } %o 41} 42