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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
60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple %ms_abi_triple -emit-llvm -o - %s | FileCheck %s -check-prefix MS
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// CHECK-NOT: _ZN1CC1ERK1C
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// CHECK-NOT: _ZN1SC1ERK1S
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// MS-NOT: ?0C@@QAE@ABV0
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// MS-NOT: ?0S@@QAE@ABV0
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extern "C" int printf(...);
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struct C {
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C() : iC(6) {printf("C()\n"); }
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C(const C& c) { printf("C(const C& c)\n"); }
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int iC;
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};
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C foo() {
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return C();
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};
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class X { // ...
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public:
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X(int) {}
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X(const X&, int i = 1, int j = 2, C c = foo()) {
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printf("X(const X&, %d, %d, %d)\n", i, j, c.iC);
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}
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};
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struct S {
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S();
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};
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S::S() { printf("S()\n"); }
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void Call(S) {};
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int main() {
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X a(1);
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X b(a, 2);
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X c = b;
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X d(a, 5, 6);
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S s;
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Call(s);
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}
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struct V {
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int x;
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};
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typedef V V_over_aligned __attribute((aligned(8)));
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extern const V_over_aligned gv1 = {};
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extern "C" V f() { return gv1; }
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// Make sure that we obey the destination's alignment requirements when emitting
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// the copy.
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// CHECK-LABEL: define {{.*}} @f(
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// CHECK: call void @llvm.memcpy.p0i8.p0i8.{{i64|i32}}({{.*}}align 4{{.*}}, i8* align 8 bitcast (%struct.V* @gv1 to i8*), {{i64|i32}} 4, i1 false)
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