xref: /aosp_15_r20/external/compiler-rt/test/msan/select_origin.cc (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6) 
1*7c3d14c8STreehugger Robot // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
2*7c3d14c8STreehugger Robot // RUN: %clangxx_msan -fsanitize-memory-track-origins -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
3*7c3d14c8STreehugger Robot // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s
4*7c3d14c8STreehugger Robot 
5*7c3d14c8STreehugger Robot // Test condition origin propagation through "select" IR instruction.
6*7c3d14c8STreehugger Robot 
7*7c3d14c8STreehugger Robot #include <stdio.h>
8*7c3d14c8STreehugger Robot #include <stdint.h>
9*7c3d14c8STreehugger Robot 
10*7c3d14c8STreehugger Robot __attribute__((noinline))
max_by_ptr(int * a,int * b)11*7c3d14c8STreehugger Robot int *max_by_ptr(int *a, int *b) {
12*7c3d14c8STreehugger Robot   return *a < *b ? b : a;
13*7c3d14c8STreehugger Robot }
14*7c3d14c8STreehugger Robot 
main(void)15*7c3d14c8STreehugger Robot int main(void) {
16*7c3d14c8STreehugger Robot   int x;
17*7c3d14c8STreehugger Robot   int *volatile px = &x;
18*7c3d14c8STreehugger Robot   int y = 43;
19*7c3d14c8STreehugger Robot   int *p = max_by_ptr(px, &y);
20*7c3d14c8STreehugger Robot   // CHECK: Uninitialized value was created by an allocation of 'x' in the stack frame of function 'main'
21*7c3d14c8STreehugger Robot   return *p;
22*7c3d14c8STreehugger Robot }
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