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d25e0aac41
Constant values of _BitInt have the bitwith to exactly fit the constant number. This patch fix a problem in Sema when building an APInt where the supplied bitwidth can become too small and simply truncate the value leading to a faulty warning.
27 lines
1.0 KiB
C
27 lines
1.0 KiB
C
// RUN: %clang_cc1 -verify -fsyntax-only -std=c2x -triple=x86_64-unknown-linux %s
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// Regression test for bug where we used to hit an assertion due to shift amount
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// being larger than 64 bits. We want to see a warning about too large shift
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// amount.
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void test1(int *a) {
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(void)(*a >> 123456789012345678901uwb <= 0); // expected-warning {{shift count >= width of type}}
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}
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// Similar to test1 above, but using __uint128_t instead of __BitInt.
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// We want to see a warning about too large shift amount.
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void test2(__uint128_t *a) {
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(void)(*a >> ((__uint128_t)__UINT64_MAX__ + 1) <= 0); // expected-warning {{shift count >= width of type}}
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}
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// Regression test for bug where a faulty warning was given. We don't expect to
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// see any warning in this case.
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_BitInt(128) test3(_BitInt(128) a) {
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return a << 12wb;
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}
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// Similar to test3 above, but with a too large shift count. We expect to see a
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// warning in this case.
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_BitInt(128) test4(_BitInt(128) a) {
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return a << 129wb; // expected-warning {{shift count >= width of type}}
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}
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