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b78ac2bb60
An *inferred* `return` function attribute doesn't affect the mangled name anymore with 2.086 (dlang/dmd#9508). I haven't checked why it has been working before and only fails since advancing to DMD stable.
126 lines
4.2 KiB
D
126 lines
4.2 KiB
D
// Tests minimal use of temporaries in non-optimized builds for struct and array assignment.
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// Tests `.init` assignment in particular.
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// RUN: %ldc -output-ll %s -of=%t.ll && FileCheck %s < %t.ll
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void opaque();
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FloatStruct opaque(FloatStruct);
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FloatStruct opaqueret();
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struct FloatStruct {
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float[10] data;
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}
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FloatStruct globalStruct;
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack3fooFZv
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void foo() {
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globalStruct = FloatStruct.init;
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// There should be only one memcpy.
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// CHECK: call void @llvm.memcpy
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// CHECK-NEXT: ret void
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack3hhhFZv
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void hhh() {
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globalStruct = FloatStruct([1, 0, 0, 0, 0, 0, 0, 0, 0, 42]);
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// Future work: test optimized codegen (at -O0)
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack3gggFZv
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void ggg() {
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globalStruct = opaqueret();
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// opaque() could be accessing globalStruct, in-place assignment not possible.
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// CHECK: sret_tmp = alloca %assign_struct_init_without_stack.FloatStruct
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// CHECK: call {{.*}}opaqueret
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// CHECK: call void @llvm.memcpy
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// CHECK-NEXT: ret void
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack5localFZv
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void local() {
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FloatStruct local;
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local = opaque(local);
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// Not possible to do in-place assignment, so temporary must be created.
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// CHECK: local = alloca %assign_struct_init_without_stack.FloatStruct
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// CHECK: sret_tmp = alloca %assign_struct_init_without_stack.FloatStruct
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// CHECK: call {{.*}}opaque
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// CHECK: call void @llvm.memcpy
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// CHECK-NEXT: ret void
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack5arrayFZv
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void array() {
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int[5] arr = [0,1,2,3,4];
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// Future work: test optimized codegen (at -O0)
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack6array2FKG3iZv
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void array2(ref int[3] a) {
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a = [4, a[0], 6];
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// There should be a temporary!
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// CHECK: alloca [3 x i32]
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// CHECK: call void @llvm.memcpy
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// CHECK-NEXT: ret void
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}
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struct OpAssignStruct {
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float[10] data;
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ubyte a;
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ref OpAssignStruct opAssign(R)(auto ref R rhs) return {
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return this;
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}
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}
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OpAssignStruct globalOpAssignStruct;
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OpAssignStruct globalOpAssignStruct2;
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack16tupleassignByValFZv
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void tupleassignByVal()
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{
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globalOpAssignStruct = OpAssignStruct.init;
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// There should be one memcpy to a temporary.
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// CHECK: alloca %assign_struct_init_without_stack.OpAssignStruct
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// CHECK: call void @llvm.memcpy
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// CHECK-NOT: memcpy
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// CHECK: call{{.*}} %assign_struct_init_without_stack.OpAssignStruct* @{{.*}}_D32assign_struct_init_without_stack14OpAssignStruct__T8opAssignTSQCmQBhZQsMFNaNbNcNiNjNfQyZQBb
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// CHECK-NEXT: ret void
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack16tupleassignByRefFZv
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void tupleassignByRef()
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{
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globalOpAssignStruct = globalOpAssignStruct2;
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// There should not be a memcpy.
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// CHECK-NOT: memcpy
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// CHECK: call{{.*}} %assign_struct_init_without_stack.OpAssignStruct* @{{.*}}_D32assign_struct_init_without_stack14OpAssignStruct__T8opAssignTSQCmQBhZQsMFNaNbNcNiNjNfKQzZQBc
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// CHECK-NEXT: ret void
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}
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struct DtorStruct {
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float[10] data;
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~this() { opaque(); }
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}
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struct CtorStruct {
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float[10] data;
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this(int i) { opaque(); }
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}
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DtorStruct dtorStruct;
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CtorStruct ctorStruct;
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack4ctorFZv
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void ctor() {
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ctorStruct = ctorStruct.init;
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// There is no dtor, so can be optimized to only a memcpy.
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// CHECK-NEXT: call void @llvm.memcpy
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// CHECK-NEXT: ret void
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}
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// CHECK-LABEL: define{{.*}} @{{.*}}_D32assign_struct_init_without_stack4dtorFZv
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void dtor() {
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dtorStruct = dtorStruct.init;
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// There should be a temporary and a call to opAssign
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// CHECK: alloca %assign_struct_init_without_stack.DtorStruct
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// CHECK: call void @llvm.memcpy{{.*}}_D32assign_struct_init_without_stack10DtorStruct6__initZ
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// CHECK-NEXT: call {{.*}}_D32assign_struct_init_without_stack10DtorStruct8opAssignMFNcNjSQCkQBfZQi
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// CHECK-NEXT: ret void
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}
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