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16e6bc23a1
dead code. This is important for C++ templates that essentially compute the valid input in a way that is constant and will cause all the invalid cases to be dead code that is deleted. Code in the wild actually does this and GCC also accepts these kinds of patterns so it is important to support it. To make this work, we provide a non-error path to diagnose these issues, and use a default-error warning instead. This keeps the relatively strict handling but prevents nastiness like SFINAE on these errors. It also allows us to safely use the system to diagnose this only when it occurs at runtime (in emitted code). Entertainingly, this required fixing the syntax in various other ways for the x86 test because we never bothered to diagnose that the returns were invalid. Since debugging these compile failures was super confusing, I've also improved the diagnostic to actually say what the value was. Most of the checks I've made ignore this to simplify maintenance, but I've checked it in a few places to make sure the diagnsotic is working. Depends on D48462. Without that, we might actually crash some part of the compiler after bypassing the error here. Thanks to Richard, Ben Kramer, and especially Craig Topper for all the help here. Differential Revision: https://reviews.llvm.org/D48464 llvm-svn: 335309
338 lines
15 KiB
C
338 lines
15 KiB
C
// RUN: %clang_cc1 -triple armv7 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -triple armv7 -target-abi apcs-gnu \
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// RUN: -fsyntax-only -verify %s
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#include <arm_acle.h>
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void f(void *a, void *b) {
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__clear_cache(); // expected-error {{too few arguments to function call, expected 2, have 0}} // expected-note {{'__clear_cache' is a builtin with type 'void (void *, void *)}}
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__clear_cache(a); // expected-error {{too few arguments to function call, expected 2, have 1}}
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__clear_cache(a, b);
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}
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void __clear_cache(char*, char*); // expected-error {{conflicting types for '__clear_cache'}}
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void __clear_cache(void*, void*);
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#if defined(__ARM_PCS) || defined(__ARM_EABI__)
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// va_list on ARM AAPCS is struct { void* __ap }.
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void test1() {
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__builtin_va_list ptr;
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ptr.__ap = "x";
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*(ptr.__ap) = '0'; // expected-error {{incomplete type 'void' is not assignable}}
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}
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#else
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// va_list on ARM apcs-gnu is void*.
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void test1() {
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__builtin_va_list ptr;
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ptr.__ap = "x"; // expected-error {{member reference base type '__builtin_va_list' is not a structure or union}}
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*(ptr.__ap) = '0';// expected-error {{member reference base type '__builtin_va_list' is not a structure or union}}
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}
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void test2() {
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__builtin_va_list ptr = "x";
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*ptr = '0'; // expected-error {{incomplete type 'void' is not assignable}}
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}
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#endif
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void test3() {
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__builtin_arm_dsb(16); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_dmb(17); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_isb(18); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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void test4() {
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__builtin_arm_prefetch(0, 2, 0); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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__builtin_arm_prefetch(0, 0, 2); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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void test5() {
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__builtin_arm_dbg(16); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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void test6(int a, int b, int c) {
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__builtin_arm_ldc(1, 2, &a);
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__builtin_arm_ldc(a, 2, &a); // expected-error {{argument to '__builtin_arm_ldc' must be a constant integer}}
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__builtin_arm_ldc(1, a, &a); // expected-error {{argument to '__builtin_arm_ldc' must be a constant integer}}
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__builtin_arm_ldcl(1, 2, &a);
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__builtin_arm_ldcl(a, 2, &a); // expected-error {{argument to '__builtin_arm_ldcl' must be a constant integer}}
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__builtin_arm_ldcl(1, a, &a); // expected-error {{argument to '__builtin_arm_ldcl' must be a constant integer}}
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__builtin_arm_ldc2(1, 2, &a);
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__builtin_arm_ldc2(a, 2, &a); // expected-error {{argument to '__builtin_arm_ldc2' must be a constant integer}}
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__builtin_arm_ldc2(1, a, &a); // expected-error {{argument to '__builtin_arm_ldc2' must be a constant integer}}
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__builtin_arm_ldc2l(1, 2, &a);
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__builtin_arm_ldc2l(a, 2, &a); // expected-error {{argument to '__builtin_arm_ldc2l' must be a constant integer}}
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__builtin_arm_ldc2l(1, a, &a); // expected-error {{argument to '__builtin_arm_ldc2l' must be a constant integer}}
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__builtin_arm_stc(1, 2, &a);
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__builtin_arm_stc(a, 2, &a); // expected-error {{argument to '__builtin_arm_stc' must be a constant integer}}
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__builtin_arm_stc(1, a, &a); // expected-error {{argument to '__builtin_arm_stc' must be a constant integer}}
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__builtin_arm_stcl(1, 2, &a);
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__builtin_arm_stcl(a, 2, &a); // expected-error {{argument to '__builtin_arm_stcl' must be a constant integer}}
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__builtin_arm_stcl(1, a, &a); // expected-error {{argument to '__builtin_arm_stcl' must be a constant integer}}
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__builtin_arm_stc2(1, 2, &a);
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__builtin_arm_stc2(a, 2, &a); // expected-error {{argument to '__builtin_arm_stc2' must be a constant integer}}
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__builtin_arm_stc2(1, a, &a); // expected-error {{argument to '__builtin_arm_stc2' must be a constant integer}}
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__builtin_arm_stc2l(1, 2, &a);
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__builtin_arm_stc2l(a, 2, &a); // expected-error {{argument to '__builtin_arm_stc2l' must be a constant integer}}
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__builtin_arm_stc2l(1, a, &a); // expected-error {{argument to '__builtin_arm_stc2l' must be a constant integer}}
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__builtin_arm_cdp(a, 2, 3, 4, 5, 6); // expected-error {{argument to '__builtin_arm_cdp' must be a constant integer}}
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__builtin_arm_cdp(1, a, 3, 4, 5, 6); // expected-error {{argument to '__builtin_arm_cdp' must be a constant integer}}
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__builtin_arm_cdp(1, 2, a, 4, 5, 6); // expected-error {{argument to '__builtin_arm_cdp' must be a constant integer}}
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__builtin_arm_cdp(1, 2, 3, a, 5, 6); // expected-error {{argument to '__builtin_arm_cdp' must be a constant integer}}
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__builtin_arm_cdp(1, 2, 3, 4, 5, a); // expected-error {{argument to '__builtin_arm_cdp' must be a constant integer}}
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__builtin_arm_cdp2(a, 2, 3, 4, 5, 6); // expected-error {{argument to '__builtin_arm_cdp2' must be a constant integer}}
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__builtin_arm_cdp2(1, a, 3, 4, 5, 6); // expected-error {{argument to '__builtin_arm_cdp2' must be a constant integer}}
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__builtin_arm_cdp2(1, 2, a, 4, 5, 6); // expected-error {{argument to '__builtin_arm_cdp2' must be a constant integer}}
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__builtin_arm_cdp2(1, 2, 3, a, 5, 6); // expected-error {{argument to '__builtin_arm_cdp2' must be a constant integer}}
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__builtin_arm_cdp2(1, 2, 3, 4, 5, a); // expected-error {{argument to '__builtin_arm_cdp2' must be a constant integer}}
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__builtin_arm_mrc( a, 0, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mrc' must be a constant integer}}
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__builtin_arm_mrc(15, a, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mrc' must be a constant integer}}
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__builtin_arm_mrc(15, 0, a, 0, 3); // expected-error {{argument to '__builtin_arm_mrc' must be a constant integer}}
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__builtin_arm_mrc(15, 0, 13, a, 3); // expected-error {{argument to '__builtin_arm_mrc' must be a constant integer}}
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__builtin_arm_mrc(15, 0, 13, 0, a); // expected-error {{argument to '__builtin_arm_mrc' must be a constant integer}}
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__builtin_arm_mrc2( a, 0, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mrc2' must be a constant integer}}
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__builtin_arm_mrc2(15, a, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mrc2' must be a constant integer}}
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__builtin_arm_mrc2(15, 0, a, 0, 3); // expected-error {{argument to '__builtin_arm_mrc2' must be a constant integer}}
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__builtin_arm_mrc2(15, 0, 13, a, 3); // expected-error {{argument to '__builtin_arm_mrc2' must be a constant integer}}
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__builtin_arm_mrc2(15, 0, 13, 0, a); // expected-error {{argument to '__builtin_arm_mrc2' must be a constant integer}}
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__builtin_arm_mcr( a, 0, b, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mcr' must be a constant integer}}
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__builtin_arm_mcr(15, a, b, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mcr' must be a constant integer}}
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__builtin_arm_mcr(15, 0, b, a, 0, 3); // expected-error {{argument to '__builtin_arm_mcr' must be a constant integer}}
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__builtin_arm_mcr(15, 0, b, 13, a, 3); // expected-error {{argument to '__builtin_arm_mcr' must be a constant integer}}
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__builtin_arm_mcr(15, 0, b, 13, 0, a); // expected-error {{argument to '__builtin_arm_mcr' must be a constant integer}}
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__builtin_arm_mcr2( a, 0, b, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mcr2' must be a constant integer}}
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__builtin_arm_mcr2(15, a, b, 13, 0, 3); // expected-error {{argument to '__builtin_arm_mcr2' must be a constant integer}}
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__builtin_arm_mcr2(15, 0, b, a, 0, 3); // expected-error {{argument to '__builtin_arm_mcr2' must be a constant integer}}
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__builtin_arm_mcr2(15, 0, b, 13, a, 3); // expected-error {{argument to '__builtin_arm_mcr2' must be a constant integer}}
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__builtin_arm_mcr2(15, 0, b, 13, 0, a); // expected-error {{argument to '__builtin_arm_mcr2' must be a constant integer}}
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__builtin_arm_mcrr(15, 0, b, 0);
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__builtin_arm_mcrr( a, 0, b, 0); // expected-error {{argument to '__builtin_arm_mcrr' must be a constant integer}}
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__builtin_arm_mcrr(15, a, b, 0); // expected-error {{argument to '__builtin_arm_mcrr' must be a constant integer}}
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__builtin_arm_mcrr(15, 0, b, a); // expected-error {{argument to '__builtin_arm_mcrr' must be a constant integer}}
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__builtin_arm_mcrr2(15, 0, b, 0);
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__builtin_arm_mcrr2( a, 0, b, 0); // expected-error {{argument to '__builtin_arm_mcrr2' must be a constant integer}}
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__builtin_arm_mcrr2(15, a, b, 0); // expected-error {{argument to '__builtin_arm_mcrr2' must be a constant integer}}
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__builtin_arm_mcrr2(15, 0, b, a); // expected-error {{argument to '__builtin_arm_mcrr2' must be a constant integer}}
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__builtin_arm_mrrc(15, 0, 0);
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__builtin_arm_mrrc( a, 0, 0); // expected-error {{argument to '__builtin_arm_mrrc' must be a constant integer}}
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__builtin_arm_mrrc(15, a, 0); // expected-error {{argument to '__builtin_arm_mrrc' must be a constant integer}}
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__builtin_arm_mrrc(15, 0, a); // expected-error {{argument to '__builtin_arm_mrrc' must be a constant integer}}
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__builtin_arm_mrrc2(15, 0, 0);
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__builtin_arm_mrrc2( a, 0, 0); // expected-error {{argument to '__builtin_arm_mrrc2' must be a constant integer}}
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__builtin_arm_mrrc2(15, a, 0); // expected-error {{argument to '__builtin_arm_mrrc2' must be a constant integer}}
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__builtin_arm_mrrc2(15, 0, a); // expected-error {{argument to '__builtin_arm_mrrc2' must be a constant integer}}
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}
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void test_9_3_multiplications(int a, int b) {
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int r;
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r = __builtin_arm_smulbb(a, b);
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r = __builtin_arm_smulbb(1, -9);
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r = __builtin_arm_smulbt(a, b);
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r = __builtin_arm_smulbt(0, b);
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r = __builtin_arm_smultb(a, b);
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r = __builtin_arm_smultb(5, b);
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r = __builtin_arm_smultt(a, b);
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r = __builtin_arm_smultt(a, -1);
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r = __builtin_arm_smulwb(a, b);
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r = __builtin_arm_smulwb(1, 2);
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r = __builtin_arm_smulwt(a, b);
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r = __builtin_arm_smulwt(-1, -2);
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r = __builtin_arm_smulwt(-1.0f, -2);
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}
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void test_9_4_1_width_specified_saturation(int a, int b) {
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unsigned u;
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int s;
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s = __builtin_arm_ssat(8, 2);
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s = __builtin_arm_ssat(a, 1);
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s = __builtin_arm_ssat(a, 32);
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s = __builtin_arm_ssat(a, 0); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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s = __builtin_arm_ssat(a, 33); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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s = __builtin_arm_ssat(a, b); // expected-error {{argument to '__builtin_arm_ssat' must be a constant integer}}
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u = __builtin_arm_usat(8, 2);
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u = __builtin_arm_usat(a, 0);
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u = __builtin_arm_usat(a, 31);
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u = __builtin_arm_usat(a, 32); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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u = __builtin_arm_usat(a, b); // expected-error {{argument to '__builtin_arm_usat' must be a constant integer}}
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}
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void test_9_4_2_saturating_addition_subtraction(int a, int b) {
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int s;
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s = __builtin_arm_qadd(a, b);
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s = __builtin_arm_qadd(-1, 0);
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s = __builtin_arm_qsub(a, b);
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s = __builtin_arm_qsub(0, -1);
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s = __builtin_arm_qdbl(a);
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}
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void test_9_4_3_accumulating_multiplications(int a, int b, int c) {
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int s;
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s = __builtin_arm_smlabb(a, b, c);
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s = __builtin_arm_smlabb(1, b, c);
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s = __builtin_arm_smlabb(a, 2, c);
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s = __builtin_arm_smlabb(a, b, -3);
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s = __builtin_arm_smlabt(a, b, c);
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s = __builtin_arm_smlabt(1, b, c);
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s = __builtin_arm_smlabt(a, 2, c);
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s = __builtin_arm_smlabt(a, b, -3);
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s = __builtin_arm_smlatb(a, b, c);
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s = __builtin_arm_smlatt(1, b, c);
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s = __builtin_arm_smlawb(a, 2, c);
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s = __builtin_arm_smlawt(a, b, -3);
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}
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void test_9_5_4_parallel_16bit_saturation(int16x2_t a) {
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unsigned u;
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int s;
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s = __builtin_arm_ssat16(a, 1);
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s = __builtin_arm_ssat16(a, 16);
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s = __builtin_arm_ssat16(a, 0); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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s = __builtin_arm_ssat16(a, 17); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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u = __builtin_arm_usat16(a, 0);
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u = __builtin_arm_usat16(a, 15);
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u = __builtin_arm_usat16(a, 16); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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void test_9_5_5_packing_and_unpacking(int16x2_t a, int8x4_t b, uint16x2_t c, uint8x4_t d) {
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int16x2_t x;
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uint16x2_t y;
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x = __builtin_arm_sxtab16(a, b);
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x = __builtin_arm_sxtab16(1, -1);
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x = __builtin_arm_sxtb16(b);
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x = __builtin_arm_sxtb16(-b);
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y = __builtin_arm_uxtab16(c, d);
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y = __builtin_arm_uxtab16(-1, -2);
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y = __builtin_arm_uxtb16(d);
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y = __builtin_arm_uxtb16(-1);
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}
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uint8x4_t
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test_9_5_6_parallel_selection(uint8x4_t a, uint8x4_t b) {
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return __builtin_arm_sel(a, b);
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}
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void test_9_5_7_parallel_8bit_addition_substraction(int8x4_t a, int8x4_t b,
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uint8x4_t c, uint8x4_t d) {
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int8x4_t s;
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uint8x4_t u;
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s = __builtin_arm_qadd8(a, b);
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s = __builtin_arm_qsub8(a, b);
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s = __builtin_arm_sadd8(a, b);
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s = __builtin_arm_shadd8(a, b);
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s = __builtin_arm_shsub8(a, b);
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s = __builtin_arm_ssub8(a, b);
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u = __builtin_arm_uadd8(c, d);
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u = __builtin_arm_uhadd8(c, d);
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u = __builtin_arm_uhsub8(c, d);
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u = __builtin_arm_uqadd8(c, d);
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u = __builtin_arm_uqsub8(c, d);
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u = __builtin_arm_usub8(c, d);
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}
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void test_9_5_8_absolute_differences(uint8x4_t a, uint8x4_t b, uint32_t c) {
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uint32_t r;
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r = __builtin_arm_usad8(a, b);
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r = __builtin_arm_usada8(a, b, c);
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}
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void test_9_5_9_parallel_addition_and_subtraction(int16x2_t a, int16x2_t b,
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uint16x2_t c, uint16x2_t d) {
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int16x2_t x;
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uint16x2_t y;
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x = __builtin_arm_qadd16(a, b);
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x = __builtin_arm_qasx(a, b);
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x = __builtin_arm_qsax(a, b);
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x = __builtin_arm_qsub16(a, b);
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x = __builtin_arm_sadd16(a, b);
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x = __builtin_arm_sasx(a, b);
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x = __builtin_arm_shadd16(a, b);
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x = __builtin_arm_shasx(a, b);
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x = __builtin_arm_shsax(a, b);
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x = __builtin_arm_shsub16(a, b);
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x = __builtin_arm_ssax(a, b);
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x = __builtin_arm_ssub16(a, b);
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y = __builtin_arm_uadd16(c, d);
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y = __builtin_arm_uasx(c, d);
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y = __builtin_arm_uhadd16(c, d);
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y = __builtin_arm_uhasx(c, d);
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y = __builtin_arm_uhsax(c, d);
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y = __builtin_arm_uhsub16(c, d);
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y = __builtin_arm_uqadd16(c, d);
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y = __builtin_arm_uqasx(c, d);
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y = __builtin_arm_uqsax(c, d);
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y = __builtin_arm_uqsub16(c, d);
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y = __builtin_arm_usax(c, d);
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y = __builtin_arm_usub16(c, d);
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}
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void test_9_5_10_parallel_16bit_multiplication(int16x2_t a, int16x2_t b,
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int32_t c, int64_t d) {
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int32_t x;
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int64_t y;
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x = __builtin_arm_smlad(a, b, c);
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x = __builtin_arm_smladx(a, b, c);
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y = __builtin_arm_smlald(a, b, d);
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y = __builtin_arm_smlaldx(a, b, d);
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x = __builtin_arm_smlsd(a, b, c);
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x = __builtin_arm_smlsdx(a, b, c);
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y = __builtin_arm_smlsld(a, b, d);
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y = __builtin_arm_smlsldx(a, b, d);
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x = __builtin_arm_smuad(a, b);
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x = __builtin_arm_smuadx(a, b);
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x = __builtin_arm_smusd(a, b);
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x = __builtin_arm_smusdx(a, b);
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}
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void test_VFP(float f, double d) {
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float fr;
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double dr;
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fr = __builtin_arm_vcvtr_f(f, 0);
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fr = __builtin_arm_vcvtr_f(f, 1);
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fr = __builtin_arm_vcvtr_f(f, -1); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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fr = __builtin_arm_vcvtr_f(f, 2); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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dr = __builtin_arm_vcvtr_f(d, 0);
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dr = __builtin_arm_vcvtr_f(d, 1);
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dr = __builtin_arm_vcvtr_f(d, -1); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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dr = __builtin_arm_vcvtr_f(d, 2); // expected-error-re {{argument value {{.*}} is outside the valid range}}
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}
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