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d77c62053c
Summary: Byval requires allocating additional stack space, and always requires an implicit copy to be inserted in codegen, where it can be difficult to optimize. In this work, we use byref/IndirectAliased promotion method instead of byval with the implicit copy semantics. Reviewers: arsenm Differential Revision: https://reviews.llvm.org/D155986
119 lines
5.7 KiB
C++
119 lines
5.7 KiB
C++
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
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// RUN: %clang_cc1 -O0 -triple amdgcn -emit-llvm %s -o - | FileCheck %s
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class A {
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public:
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int x;
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A():x(0) {}
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~A() {}
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};
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class B {
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int x[100];
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};
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A g_a;
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B g_b;
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void func_with_ref_arg(A &a);
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void func_with_ref_arg(B &b);
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// CHECK-LABEL: @_Z22func_with_indirect_arg1A(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A_INDIRECT_ADDR:%.*]] = alloca ptr, align 8, addrspace(5)
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// CHECK-NEXT: [[P:%.*]] = alloca ptr, align 8, addrspace(5)
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// CHECK-NEXT: [[A_INDIRECT_ADDR_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[A_INDIRECT_ADDR]] to ptr
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// CHECK-NEXT: [[P_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[P]] to ptr
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// CHECK-NEXT: store ptr addrspace(5) [[A:%.*]], ptr [[A_INDIRECT_ADDR_ASCAST]], align 8
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// CHECK-NEXT: [[A_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[A]] to ptr
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// CHECK-NEXT: store ptr [[A_ASCAST]], ptr [[P_ASCAST]], align 8
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// CHECK-NEXT: ret void
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//
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void func_with_indirect_arg(A a) {
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A *p = &a;
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}
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// CHECK-LABEL: @_Z22test_indirect_arg_autov(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[A:%.*]] = alloca [[CLASS_A:%.*]], align 4, addrspace(5)
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// CHECK-NEXT: [[AGG_TMP:%.*]] = alloca [[CLASS_A]], align 4, addrspace(5)
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// CHECK-NEXT: [[A_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[A]] to ptr
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// CHECK-NEXT: [[AGG_TMP_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[AGG_TMP]] to ptr
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// CHECK-NEXT: call void @_ZN1AC1Ev(ptr noundef nonnull align 4 dereferenceable(4) [[A_ASCAST]])
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[AGG_TMP_ASCAST]], ptr align 4 [[A_ASCAST]], i64 4, i1 false)
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// CHECK-NEXT: [[AGG_TMP_ASCAST_ASCAST:%.*]] = addrspacecast ptr [[AGG_TMP_ASCAST]] to ptr addrspace(5)
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// CHECK-NEXT: call void @_Z22func_with_indirect_arg1A(ptr addrspace(5) noundef [[AGG_TMP_ASCAST_ASCAST]])
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 4 dereferenceable(4) [[AGG_TMP_ASCAST]])
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// CHECK-NEXT: call void @_Z17func_with_ref_argR1A(ptr noundef nonnull align 4 dereferenceable(4) [[A_ASCAST]])
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 4 dereferenceable(4) [[A_ASCAST]])
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// CHECK-NEXT: ret void
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//
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void test_indirect_arg_auto() {
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A a;
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func_with_indirect_arg(a);
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func_with_ref_arg(a);
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}
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// CHECK-LABEL: @_Z24test_indirect_arg_globalv(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[AGG_TMP:%.*]] = alloca [[CLASS_A:%.*]], align 4, addrspace(5)
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// CHECK-NEXT: [[AGG_TMP_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[AGG_TMP]] to ptr
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[AGG_TMP_ASCAST]], ptr align 4 addrspacecast (ptr addrspace(1) @g_a to ptr), i64 4, i1 false)
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// CHECK-NEXT: [[AGG_TMP_ASCAST_ASCAST:%.*]] = addrspacecast ptr [[AGG_TMP_ASCAST]] to ptr addrspace(5)
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// CHECK-NEXT: call void @_Z22func_with_indirect_arg1A(ptr addrspace(5) noundef [[AGG_TMP_ASCAST_ASCAST]])
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// CHECK-NEXT: call void @_ZN1AD1Ev(ptr noundef nonnull align 4 dereferenceable(4) [[AGG_TMP_ASCAST]])
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// CHECK-NEXT: call void @_Z17func_with_ref_argR1A(ptr noundef nonnull align 4 dereferenceable(4) addrspacecast (ptr addrspace(1) @g_a to ptr))
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// CHECK-NEXT: ret void
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//
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void test_indirect_arg_global() {
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func_with_indirect_arg(g_a);
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func_with_ref_arg(g_a);
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}
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// CHECK-LABEL: @_Z19func_with_byval_arg1B(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[COERCE:%.*]] = alloca [[CLASS_B:%.*]], align 4, addrspace(5)
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// CHECK-NEXT: [[P:%.*]] = alloca ptr, align 8, addrspace(5)
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// CHECK-NEXT: [[B:%.*]] = addrspacecast ptr addrspace(5) [[COERCE]] to ptr
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// CHECK-NEXT: [[P_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[P]] to ptr
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// CHECK-NEXT: call void @llvm.memcpy.p0.p5.i64(ptr align 4 [[B]], ptr addrspace(5) align 4 [[TMP0:%.*]], i64 400, i1 false)
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// CHECK-NEXT: store ptr [[B]], ptr [[P_ASCAST]], align 8
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// CHECK-NEXT: ret void
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//
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void func_with_byval_arg(B b) {
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B *p = &b;
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}
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// CHECK-LABEL: @_Z19test_byval_arg_autov(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[B:%.*]] = alloca [[CLASS_B:%.*]], align 4, addrspace(5)
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// CHECK-NEXT: [[AGG_TMP:%.*]] = alloca [[CLASS_B]], align 4, addrspace(5)
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// CHECK-NEXT: [[B_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[B]] to ptr
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// CHECK-NEXT: [[AGG_TMP_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[AGG_TMP]] to ptr
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[AGG_TMP_ASCAST]], ptr align 4 [[B_ASCAST]], i64 400, i1 false)
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// CHECK-NEXT: [[AGG_TMP_ASCAST_ASCAST:%.*]] = addrspacecast ptr [[AGG_TMP_ASCAST]] to ptr addrspace(5)
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// CHECK-NEXT: call void @_Z19func_with_byval_arg1B(ptr addrspace(5) noundef byref([[CLASS_B]]) align 4 [[AGG_TMP_ASCAST_ASCAST]])
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// CHECK-NEXT: call void @_Z17func_with_ref_argR1B(ptr noundef nonnull align 4 dereferenceable(400) [[B_ASCAST]])
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// CHECK-NEXT: ret void
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//
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void test_byval_arg_auto() {
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B b;
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func_with_byval_arg(b);
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func_with_ref_arg(b);
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}
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// CHECK-LABEL: @_Z21test_byval_arg_globalv(
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// CHECK-NEXT: entry:
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// CHECK-NEXT: [[AGG_TMP:%.*]] = alloca [[CLASS_B:%.*]], align 4, addrspace(5)
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// CHECK-NEXT: [[AGG_TMP_ASCAST:%.*]] = addrspacecast ptr addrspace(5) [[AGG_TMP]] to ptr
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[AGG_TMP_ASCAST]], ptr align 4 addrspacecast (ptr addrspace(1) @g_b to ptr), i64 400, i1 false)
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// CHECK-NEXT: [[AGG_TMP_ASCAST_ASCAST:%.*]] = addrspacecast ptr [[AGG_TMP_ASCAST]] to ptr addrspace(5)
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// CHECK-NEXT: call void @_Z19func_with_byval_arg1B(ptr addrspace(5) noundef byref([[CLASS_B]]) align 4 [[AGG_TMP_ASCAST_ASCAST]])
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// CHECK-NEXT: call void @_Z17func_with_ref_argR1B(ptr noundef nonnull align 4 dereferenceable(400) addrspacecast (ptr addrspace(1) @g_b to ptr))
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// CHECK-NEXT: ret void
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//
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void test_byval_arg_global() {
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func_with_byval_arg(g_b);
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func_with_ref_arg(g_b);
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}
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