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The use of 'nocapture' for parameters and return values is incorrect for C++ types, as they can actually capture a pointer into its own value (e.g. std::string in libstdc++) rdar://115062687
54 lines
2.3 KiB
Plaintext
54 lines
2.3 KiB
Plaintext
// RUN: %target-swift-frontend %s -Xllvm -sil-disable-pass=simplification -emit-ir | %FileCheck %s
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// REQUIRES: CPU=x86_64
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sil_stage canonical
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import Builtin
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// This type has equal stride and size.
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struct SameSizeStride { var x, y: Builtin.Int32 }
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// This type has unequal stride and size.
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struct DifferentSizeStride { var x: Builtin.Int32, y: Builtin.Int16 }
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// CHECK: define{{( protected)?}} {{.*}}void @same_size_stride(ptr noalias nocapture dereferenceable({{.*}}) %0, i64 %1) {{.*}} {
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// CHECK: getelementptr inbounds %T8indexing14SameSizeStrideV, ptr %0, i64 %1
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sil @same_size_stride : $@convention(thin) (@in SameSizeStride, Builtin.Word) -> () {
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entry(%p : $*SameSizeStride, %i: $Builtin.Word):
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%q = index_addr %p : $*SameSizeStride, %i : $Builtin.Word
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return undef : $()
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}
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// CHECK: define{{( protected)?}} {{.*}}void @different_size_stride(ptr noalias nocapture dereferenceable({{.*}}) %0, i64 %1) {{.*}} {
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// CHECK: %2 = mul nsw i64 %1, 8
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// CHECK-NEXT: %3 = getelementptr inbounds i8, ptr %0, i64 %2
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sil @different_size_stride : $@convention(thin) (@in DifferentSizeStride, Builtin.Word) -> () {
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entry(%p : $*DifferentSizeStride, %i: $Builtin.Word):
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%q = index_addr %p : $*DifferentSizeStride, %i : $Builtin.Word
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return undef : $()
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}
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// CHECK: define{{( protected)?}} {{.*}}void @zero_size(ptr noalias nocapture %0, i64 %1) {{.*}} {
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// CHECK: %2 = mul nsw i64 %1, 1
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// CHECK-NEXT: %3 = getelementptr inbounds i8, ptr %0, i64 %2
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sil @zero_size : $@convention(thin) (@in (), Builtin.Word) -> () {
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entry(%p : $*(), %i: $Builtin.Word):
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%q = index_addr %p : $*(), %i : $Builtin.Word
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return undef : $()
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}
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// CHECK: define{{( protected)?}} {{.*}}void @dynamic_size(ptr noalias %0, i64 %1, ptr %T) {{.*}} {
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// CHECK: [[T1:%.*]] = getelementptr inbounds ptr, ptr %T, i64 -1
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// CHECK-NEXT: [[VWT:%T.valueWitnesses]] = load ptr, ptr [[T1]], align 8
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// CHECK: [[STRIDE_ADDR:%.*]] = getelementptr inbounds %swift.vwtable, ptr [[VWT]], i32 0, i32 9
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// CHECK: [[STRIDE:%.*]] = load i64, ptr [[STRIDE_ADDR]]
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// CHECK-NEXT: [[T0:%.*]] = mul nsw i64 %1, [[STRIDE]]
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// CHECK-NEXT: getelementptr inbounds i8, ptr %0, i64 [[T0]]
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sil @dynamic_size : $@convention(thin) <T> (@in T, Builtin.Word) -> () {
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entry(%p : $*T, %i: $Builtin.Word):
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%q = index_addr %p : $*T, %i : $Builtin.Word
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return undef : $()
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}
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