1 ; RUN: opt < %s -basicaa -gvn -tsan -S | FileCheck %s
2 ; TSAN conflicts with load widening. Make sure the load widening is off with -tsan.
4 ; 32-bit little endian target.
5 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
7 %struct_of_8_bytes_4_aligned = type { i32, i8, i8, i8, i8}
9 @f = global %struct_of_8_bytes_4_aligned zeroinitializer, align 4
11 ; Accessing bytes 4 and 6, not ok to widen to i32 if sanitize_thread is set.
13 define i32 @test_widening_bad(i8* %P) nounwind ssp noredzone sanitize_thread {
15 %tmp = load i8, i8* getelementptr inbounds (%struct_of_8_bytes_4_aligned, %struct_of_8_bytes_4_aligned* @f, i64 0, i32 1), align 4
16 %conv = zext i8 %tmp to i32
17 %tmp1 = load i8, i8* getelementptr inbounds (%struct_of_8_bytes_4_aligned, %struct_of_8_bytes_4_aligned* @f, i64 0, i32 3), align 1
18 %conv2 = zext i8 %tmp1 to i32
19 %add = add nsw i32 %conv, %conv2
21 ; CHECK: @test_widening_bad
22 ; CHECK: call void @__tsan_read1
23 ; CHECK: call void @__tsan_read1
24 ; CHECK-NOT: call void @__tsan_read4