rsmith added inline comments.
================
Comment at: test/Sema/unary-minus-integer-impcast-2.c:1
+// RUN: %clang_cc1 %s -verify -Wconversion -fsyntax-only -triple
i386-pc-linux-gnu
+
----------------
You can combine the two tests together into a single file using a #ifdef to
detect which set of warnings to expect:
```
unsigned long b2 = -a;
#ifdef __X86_64__
// expected-warning@-2 {{higher order bits are zeroes}}
#endif
long c2 = -a;
#ifdef __X86_64__
// expected-warning@-2 {{value is always non-negative}}
#else
// expected-warning@-4 {{implicit conversion changes signedness}}
#endif
```
https://reviews.llvm.org/D52137
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