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0f1c1be196
We have a new policy in place making links to private resources something we try to avoid in source and test files. Normally, we'd organically switch to the new policy rather than make a sweeping change across a project. However, Clang is in a somewhat special circumstance currently: recently, I've had several new contributors run into rdar links around test code which their patch was changing the behavior of. This turns out to be a surprisingly bad experience, especially for newer folks, for a handful of reasons: not understanding what the link is and feeling intimidated by it, wondering whether their changes are actually breaking something important to a downstream in some way, having to hunt down strangers not involved with the patch to impose on them for help, accidental pressure from asking for potentially private IP to be made public, etc. Because folks run into these links entirely by chance (through fixing bugs or working on new features), there's not really a set of problematic links to focus on -- all of the links have basically the same potential for causing these problems. As a result, this is an omnibus patch to remove all such links. This was not a mechanical change; it was done by manually searching for rdar, radar, radr, and other variants to find all the various problematic links. From there, I tried to retain or reword the surrounding comments so that we would lose as little context as possible. However, because most links were just a plain link with no supporting context, the majority of the changes are simple removals. Differential Review: https://reviews.llvm.org/D158071
125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
// RUN: %clang_cc1 -triple i386-pc-linux-gnu -emit-llvm < %s| FileCheck %s
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typedef __WCHAR_TYPE__ wchar_t;
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typedef __SIZE_TYPE__ size_t;
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void *memcpy(void *, void const *, size_t);
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void *memccpy(void *, void const *, int, size_t);
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// CHECK: @test1
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// CHECK: call void @llvm.memset.p0.i32
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// CHECK: call void @llvm.memset.p0.i32
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// CHECK: call void @llvm.memcpy.p0.p0.i32
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// CHECK: call void @llvm.memmove.p0.p0.i32
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// CHECK-NOT: __builtin
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// CHECK: ret
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int test1(int argc, char **argv) {
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unsigned char a = 0x11223344;
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unsigned char b = 0x11223344;
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__builtin_bzero(&a, sizeof(a));
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__builtin_memset(&a, 0, sizeof(a));
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__builtin_memcpy(&a, &b, sizeof(a));
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__builtin_memmove(&a, &b, sizeof(a));
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return 0;
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}
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// CHECK: @test2
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// CHECK: call void @llvm.memcpy.p0.p0.i32
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char* test2(char* a, char* b) {
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return __builtin_memcpy(a, b, 4);
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}
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// CHECK: @test3
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// CHECK: call void @llvm.memset
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void test3(char *P) {
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__builtin___memset_chk(P, 42, 128, 128);
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}
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// CHECK: @test4
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// CHECK: call void @llvm.memcpy
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void test4(char *P, char *Q) {
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__builtin___memcpy_chk(P, Q, 128, 128);
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}
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// CHECK: @test5
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// CHECK: call void @llvm.memmove
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void test5(char *P, char *Q) {
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__builtin___memmove_chk(P, Q, 128, 128);
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}
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// CHECK: @test6
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// CHECK: call void @llvm.memcpy
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int test6(char *X) {
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return __builtin___memcpy_chk(X, X, 42, 42) != 0;
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}
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// CHECK: @test7
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// PR12094
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int test7(int *p) {
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struct snd_pcm_hw_params_t* hwparams; // incomplete type.
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// CHECK: call void @llvm.memset{{.*}} align 4 {{.*}}256, i1 false)
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__builtin_memset(p, 0, 256); // Should be alignment = 4
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// CHECK: call void @llvm.memset{{.*}} align 1 {{.*}}256, i1 false)
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__builtin_memset((char*)p, 0, 256); // Should be alignment = 1
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__builtin_memset(hwparams, 0, 256); // No crash alignment = 1
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// CHECK: call void @llvm.memset{{.*}} align 1{{.*}}256, i1 false)
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}
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// Make sure we don't over-estimate the alignment of fields of
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// packed structs.
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struct PS {
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int modes[4];
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} __attribute__((packed));
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struct PS ps;
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void test8(int *arg) {
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// CHECK: @test8
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// CHECK: call void @llvm.memcpy{{.*}} align 4 {{.*}} align 1 {{.*}} 16, i1 false)
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__builtin_memcpy(arg, ps.modes, sizeof(struct PS));
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}
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__attribute((aligned(16))) int x[4], y[4];
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void test9(void) {
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// CHECK: @test9
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// CHECK: call void @llvm.memcpy{{.*}} align 16 {{.*}} align 16 {{.*}} 16, i1 false)
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__builtin_memcpy(x, y, sizeof(y));
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}
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wchar_t dest;
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wchar_t src;
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// CHECK-LABEL: @test10
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// FIXME: Consider lowering these to llvm.memcpy / llvm.memmove.
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void test10(void) {
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// CHECK: call ptr @wmemcpy(ptr noundef @dest, ptr noundef @src, i32 noundef 4)
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__builtin_wmemcpy(&dest, &src, 4);
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// CHECK: call ptr @wmemmove(ptr noundef @dest, ptr noundef @src, i32 noundef 4)
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__builtin_wmemmove(&dest, &src, 4);
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}
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// CHECK-LABEL: @test11
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void test11(void) {
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typedef struct { int a; } b;
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int d;
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b e;
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// CHECK: call void @llvm.memcpy{{.*}}(
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memcpy(&d, (char *)&e.a, sizeof(e));
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}
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// CHECK-LABEL: @test12
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extern char dest_array[];
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extern char src_array[];
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void test12(void) {
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// CHECK: call void @llvm.memcpy{{.*}}(
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memcpy(&dest_array, &dest_array, 2);
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}
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// CHECK-LABEL: @test13
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void test13(char *d, char *s, int c, size_t n) {
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// CHECK: call ptr @memccpy
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memccpy(d, s, c, n);
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}
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