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llvm-project/clang/test/CodeGenCXX/cxx11-initializer-array-new.cpp
Daniel Neilson 6e938effaa Change memcpy/memove/memset to have dest and source alignment attributes (Step 1). 
Summary:
  Upstream LLVM is changing the the prototypes of the @llvm.memcpy/memmove/memset
intrinsics. This change updates the Clang tests for this change.

  The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument
which is required to be a constant integer. It represents the alignment of the
dest (and source), and so must be the minimum of the actual alignment of the
two.

 This change removes the alignment argument in favour of placing the alignment
attribute on the source and destination pointers of the memory intrinsic call.

 For example, code which used to read:
   call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false)
will now read
   call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false)

 At this time the source and destination alignments must be the same (Step 1).
Step 2 of the change, to be landed shortly, will relax that contraint and allow
the source and destination to have different alignments.

llvm-svn: 322964
2018-01-19 17:12:54 +00:00

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// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 %s -emit-llvm -o - | FileCheck %s
// PR10878
struct S { S(); S(int); ~S(); int n; };
void *p = new S[2][3]{ { 1, 2, 3 }, { 4, 5, 6 } };
// CHECK-LABEL: define
// CHECK: %[[ALLOC:.*]] = call i8* @_Znam(i64 32)
// CHECK: %[[COOKIE:.*]] = bitcast i8* %[[ALLOC]] to i64*
// CHECK: store i64 6, i64* %[[COOKIE]]
// CHECK: %[[START_AS_i8:.*]] = getelementptr inbounds i8, i8* %[[ALLOC]], i64 8
// CHECK: %[[START_AS_S:.*]] = bitcast i8* %[[START_AS_i8]] to %[[S:.*]]*
//
// Explicit initializers:
//
// { 1, 2, 3 }
//
// CHECK: %[[S_0:.*]] = bitcast %[[S]]* %[[START_AS_S]] to [3 x %[[S]]]*
//
// CHECK: %[[S_0_0:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_0]], i64 0, i64 0
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_0_0]], i32 1)
// CHECK: %[[S_0_1:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_0_0]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_0_1]], i32 2)
// CHECK: %[[S_0_2:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_0_1]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_0_2]], i32 3)
//
// { 4, 5, 6 }
//
// CHECK: %[[S_1:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_0]], i64 1
//
// CHECK: %[[S_1_0:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_1]], i64 0, i64 0
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_1_0]], i32 4)
// CHECK: %[[S_1_1:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_1_0]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_1_1]], i32 5)
// CHECK: %[[S_1_2:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_1_1]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_1_2]], i32 6)
//
// CHECK-NOT: br i1
// CHECK-NOT: call
// CHECK: }
int n;
void *q = new S[n][3]{ { 1, 2, 3 }, { 4, 5, 6 } };
// CHECK-LABEL: define
//
// CHECK: load i32, i32* @n
// CHECK: call {{.*}} @llvm.umul.with.overflow.i64(i64 %[[N:.*]], i64 12)
// CHECK: %[[ELTS:.*]] = mul i64 %[[N]], 3
// CHECK: call {{.*}} @llvm.uadd.with.overflow.i64(i64 %{{.*}}, i64 8)
// CHECK: %[[ALLOC:.*]] = call i8* @_Znam(i64 %{{.*}})
//
// CHECK: %[[COOKIE:.*]] = bitcast i8* %[[ALLOC]] to i64*
// CHECK: store i64 %[[ELTS]], i64* %[[COOKIE]]
// CHECK: %[[START_AS_i8:.*]] = getelementptr inbounds i8, i8* %[[ALLOC]], i64 8
// CHECK: %[[START_AS_S:.*]] = bitcast i8* %[[START_AS_i8]] to %[[S]]*
//
// Explicit initializers:
//
// { 1, 2, 3 }
//
// CHECK: %[[S_0:.*]] = bitcast %[[S]]* %[[START_AS_S]] to [3 x %[[S]]]*
//
// CHECK: %[[S_0_0:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_0]], i64 0, i64 0
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_0_0]], i32 1)
// CHECK: %[[S_0_1:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_0_0]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_0_1]], i32 2)
// CHECK: %[[S_0_2:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_0_1]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_0_2]], i32 3)
//
// { 4, 5, 6 }
//
// CHECK: %[[S_1:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_0]], i64 1
//
// CHECK: %[[S_1_0:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_1]], i64 0, i64 0
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_1_0]], i32 4)
// CHECK: %[[S_1_1:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_1_0]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_1_1]], i32 5)
// CHECK: %[[S_1_2:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_1_1]], i64 1
// CHECK: call void @_ZN1SC1Ei(%[[S]]* %[[S_1_2]], i32 6)
//
// And the rest.
//
// CHECK: %[[S_2:.*]] = getelementptr inbounds [3 x %[[S]]], [3 x %[[S]]]* %[[S_1]], i64 1
// CHECK: %[[S_2_AS_S:.*]] = bitcast [3 x %[[S]]]* %[[S_2]] to %[[S]]*
//
// CHECK: %[[REST:.*]] = sub i64 %[[ELTS]], 6
// CHECK: icmp eq i64 %[[REST]], 0
// CHECK: br i1
//
// CHECK: %[[END:.*]] = getelementptr inbounds %[[S]], %[[S]]* %[[S_2_AS_S]], i64 %[[REST]]
// CHECK: br label
//
// CHECK: %[[CUR:.*]] = phi %[[S]]* [ %[[S_2_AS_S]], {{.*}} ], [ %[[NEXT:.*]], {{.*}} ]
// CHECK: call void @_ZN1SC1Ev(%[[S]]* %[[CUR]])
// CHECK: %[[NEXT]] = getelementptr inbounds %[[S]], %[[S]]* %[[CUR]], i64 1
// CHECK: icmp eq %[[S]]* %[[NEXT]], %[[END]]
// CHECK: br i1
//
// CHECK: }
struct T { int a; };
void *r = new T[n][3]{ { 1, 2, 3 }, { 4, 5, 6 } };
// CHECK-LABEL: define
//
// CHECK: load i32, i32* @n
// CHECK: call {{.*}} @llvm.umul.with.overflow.i64(i64 %[[N:.*]], i64 12)
// CHECK: %[[ELTS:.*]] = mul i64 %[[N]], 3
//
// No cookie.
// CHECK-NOT: @llvm.uadd.with.overflow
//
// CHECK: %[[ALLOC:.*]] = call i8* @_Znam(i64 %{{.*}})
//
// CHECK: %[[START_AS_T:.*]] = bitcast i8* %[[ALLOC]] to %[[T:.*]]*
//
// Explicit initializers:
//
// { 1, 2, 3 }
//
// CHECK: %[[T_0:.*]] = bitcast %[[T]]* %[[START_AS_T]] to [3 x %[[T]]]*
//
// CHECK: %[[T_0_0:.*]] = getelementptr inbounds [3 x %[[T]]], [3 x %[[T]]]* %[[T_0]], i64 0, i64 0
// CHECK: %[[T_0_0_0:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_0_0]], i32 0, i32 0
// CHECK: store i32 1, i32* %[[T_0_0_0]]
// CHECK: %[[T_0_1:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_0_0]], i64 1
// CHECK: %[[T_0_1_0:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_0_1]], i32 0, i32 0
// CHECK: store i32 2, i32* %[[T_0_1_0]]
// CHECK: %[[T_0_2:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_0_1]], i64 1
// CHECK: %[[T_0_2_0:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_0_2]], i32 0, i32 0
// CHECK: store i32 3, i32* %[[T_0_2_0]]
//
// { 4, 5, 6 }
//
// CHECK: %[[T_1:.*]] = getelementptr inbounds [3 x %[[T]]], [3 x %[[T]]]* %[[T_0]], i64 1
//
// CHECK: %[[T_1_0:.*]] = getelementptr inbounds [3 x %[[T]]], [3 x %[[T]]]* %[[T_1]], i64 0, i64 0
// CHECK: %[[T_1_0_0:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_1_0]], i32 0, i32 0
// CHECK: store i32 4, i32* %[[T_1_0_0]]
// CHECK: %[[T_1_1:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_1_0]], i64 1
// CHECK: %[[T_1_1_0:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_1_1]], i32 0, i32 0
// CHECK: store i32 5, i32* %[[T_1_1_0]]
// CHECK: %[[T_1_2:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_1_1]], i64 1
// CHECK: %[[T_1_2_0:.*]] = getelementptr inbounds %[[T]], %[[T]]* %[[T_1_2]], i32 0, i32 0
// CHECK: store i32 6, i32* %[[T_1_2_0]]
//
// And the rest gets memset to 0.
//
// CHECK: %[[T_2:.*]] = getelementptr inbounds [3 x %[[T]]], [3 x %[[T]]]* %[[T_1]], i64 1
// CHECK: %[[T_2_AS_T:.*]] = bitcast [3 x %[[T]]]* %[[T_2]] to %[[T]]*
//
// CHECK: %[[SIZE:.*]] = sub i64 %{{.*}}, 24
// CHECK: %[[REST:.*]] = bitcast %[[T]]* %[[T_2_AS_T]] to i8*
// CHECK: call void @llvm.memset.p0i8.i64(i8* align 4 %[[REST]], i8 0, i64 %[[SIZE]], i1 false)
//
// CHECK: }
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