33b6b67462
The implementation of __builtin_strncmp and other related builtins function use getExtValue() to evaluate the size argument. This can cause a crash when the value does not fit into an int64_t value, which is can be expected since the type of the argument is size_t. The fix is to switch to using getZExtValue(). This fixes: https://github.com/llvm/llvm-project/issues/64876 Differential Revision: https://reviews.llvm.org/D158557
17 lines
827 B
C++
17 lines
827 B
C++
// RUN: %clang_cc1 -triple x86_64 -S -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
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void f(const char* C, const wchar_t *WC) {
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int x1 = __builtin_strncmp(C, "b", 0xffffffffffffffff);
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// CHECK: {{.*}}= call i32 @strncmp{{.*}}i64 noundef -1
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int x2 = __builtin_memcmp(C, "b", 0xffffffffffffffff);
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// CHECK: {{.*}}= call i32 @memcmp{{.*}}i64 noundef -1
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int x3 = __builtin_bcmp(C, "b", 0xffffffffffffffff);
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// CHECK: {{.*}}= call i32 @bcmp{{.*}}i64 noundef -1
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int x4 = __builtin_wmemcmp(WC, L"b", 0xffffffffffffffff);
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// CHECK: {{.*}}= call i32 @wmemcmp{{.*}}i64 noundef -1
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auto x5 = __builtin_memchr(C, (int)'a', 0xffffffffffffffff);
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// CHECK: {{.*}}= call ptr @memchr{{.*}}i64 noundef -1
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auto x6 = __builtin_wmemchr(WC, (int)'a', 0xffffffffffffffff);
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// CHECK: {{.*}}= call ptr @wmemchr{{.*}}i64 noundef -1
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}
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