c8bdc8db73
Summary: This change is step three in the series of changes to remove alignment argument from memcpy/memmove/memset in favour of alignment attributes. Steps: Step 1) Remove alignment parameter and create alignment parameter attributes for memcpy/memmove/memset. ( rL322965, rC322964, rL322963 ) Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing source and dest alignments. ( rL323597 ) Step 3) Update Clang to use the new IRBuilder API. Step 4) Update Polly to use the new IRBuilder API. Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API, and those that use use MemIntrinsicInst::[get|set]Alignment() to use getDestAlignment() and getSourceAlignment() instead. Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the MemIntrinsicInst::[get|set]Alignment() methods. Reference http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html Reviewers: rjmccall Subscribers: jyknight, nemanjai, nhaehnle, javed.absar, sbc100, aheejin, kbarton, fedor.sergeev, cfe-commits Differential Revision: https://reviews.llvm.org/D41677 llvm-svn: 323617
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
// RUN: %clang_cc1 -triple i386-pc-linux-gnu -emit-llvm < %s| FileCheck %s
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// CHECK: @test1
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// CHECK: call void @llvm.memset.p0i8.i32
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// CHECK: call void @llvm.memset.p0i8.i32
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.i32
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// CHECK: call void @llvm.memmove.p0i8.p0i8.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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// rdar://9289468
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// CHECK: @test2
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.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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// <rdar://problem/11314941>
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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() {
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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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