| 1 | // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 2 | // RUN: %clangxx_msan -fsanitize-memory-track-origins -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 3 | // RUN: %clangxx_msan -fsanitize-memory-track-origins -O2 %s -o %t && not %run %t 2>&1 | FileCheck %s |
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| 4 | |
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| 5 | // Test condition origin propagation through "select" IR instruction. |
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| 6 | |
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| 7 | #include <stdio.h> |
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| 8 | #include <stdint.h> |
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| 9 | |
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| 10 | __attribute__((noinline)) |
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| 11 | int *max_by_ptr(int *a, int *b) { |
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| 12 | return *a < *b ? b : a; |
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| 13 | } |
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| 14 | |
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| 15 | int main(void) { |
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| 16 | int x; |
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| 17 | int *volatile px = &x; |
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| 18 | int y = 43; |
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| 19 | int *p = max_by_ptr(a: px, b: &y); |
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| 20 | // CHECK: Uninitialized value was created by an allocation of 'x' in the stack frame |
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| 21 | return *p; |
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| 22 | } |
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| 23 | |
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