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cf7d2256d6
Summary: Inspired by MSVC, which found some occurrences of this expression on our code base. Fixes PR38950 Reviewers: rsmith, craig.topper, spatel, RKSimon, aaron.ballman, thakis Reviewed By: rsmith Subscribers: joerg, Quuxplusone, lebedev.ri, craig.topper, RKSimon, cfe-commits Differential Revision: https://reviews.llvm.org/D52137 llvm-svn: 343560
21 lines
810 B
C
21 lines
810 B
C
// RUN: %clang_cc1 %s -verify -Wconversion -fsyntax-only -triple x86_64-pc-linux-gnu
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// RUN: %clang_cc1 %s -verify -Wconversion -fsyntax-only -triple i386-pc-linux-gnu
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void test(void) {
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unsigned int a = 1;
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unsigned long long b = -a; // expected-warning {{higher order bits are zeroes after implicit conversion}}
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long long c = -a; // expected-warning {{the resulting value is always non-negative after implicit conversion}}
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unsigned long b2 = -a;
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#ifdef __x86_64__
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// expected-warning@-2 {{higher order bits are zeroes after implicit conversion}}
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#endif
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long c2 = -a;
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#ifdef __x86_64__
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// expected-warning@-2 {{the resulting value is always non-negative after implicit conversion}}
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#else
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// expected-warning@-4 {{implicit conversion changes signedness: 'unsigned int' to 'long'}}
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#endif
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}
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