derek.holloway
7502bf64a4
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267 lines
11 KiB
C++
267 lines
11 KiB
C++
// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -mmlir --mlir-print-ir-before=cir-lowering-prepare %s -o %t.cir 2> %t-before.cir
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// RUN: FileCheck --check-prefix=CIR-BEFORE-LPP --input-file=%t-before.cir %s
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// RUN: FileCheck --check-prefix=CIR --input-file=%t.cir %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -O1 %s -o %t-o1.cir
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// RUN: FileCheck --check-prefix=CIR-O1 --input-file=%t-o1.cir %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o %t-cir.ll
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// RUN: FileCheck --check-prefix=LLVM --input-file=%t-cir.ll %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o %t.ll
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// RUN: FileCheck --check-prefix=OGCG --input-file=%t.ll %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm -O1 -disable-llvm-passes %s -o %t-opt.ll
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// RUN: FileCheck --check-prefix=LLVM-OPT --input-file=%t-opt.ll %s
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// RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-linux-gnu -emit-llvm -O1 -disable-llvm-passes %s -o %t-opt-ogcg.ll
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// RUN: FileCheck --check-prefix=OGCG-OPT --input-file=%t-opt-ogcg.ll %s
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// Test for global with constant storage - const object with constructor but no destructor
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// Check that we add an llvm.invariant.start to mark when a global becomes read-only.
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struct A {
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A();
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int n;
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};
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// Should emit invariant.start - has constructor, no destructor, no mutable
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extern const A a = A();
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struct A2 {
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A2();
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constexpr ~A2() {}
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int n;
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};
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// Should emit invariant.start - constexpr destructor doesn't prevent constant storage
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extern const A2 a2 = A2();
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struct B {
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B();
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mutable int n;
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};
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// Should NOT emit invariant.start - has mutable member
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extern const B b = B();
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// Simple case - just const C c; (no initializer) - Andy's suggestion
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class C {
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public:
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C();
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int a;
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int b;
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};
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const C c;
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// CIR checks before LoweringPrepare transformation - globals have ctor regions
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// Test case 'a' - before LoweringPrepare
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// CIR-BEFORE-LPP: cir.global external @a = ctor : !rec_A {
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// CIR-BEFORE-LPP: %[[OBJ:.*]] = cir.get_global @a : !cir.ptr<!rec_A>
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// CIR-BEFORE-LPP: cir.call @_ZN1AC1Ev(%[[OBJ]]) : (!cir.ptr<!rec_A> {{.*}}) -> ()
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// CIR-BEFORE-LPP: %[[OBJ2:.*]] = cir.get_global @a : !cir.ptr<!rec_A>
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// CIR-BEFORE-LPP: }
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// Test case 'a2' - before LoweringPrepare
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// CIR-BEFORE-LPP: cir.global external @a2 = ctor : !rec_A2 {
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// CIR-BEFORE-LPP: %[[OBJ:.*]] = cir.get_global @a2 : !cir.ptr<!rec_A2>
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// CIR-BEFORE-LPP: cir.call @_ZN2A2C1Ev(%[[OBJ]]) : (!cir.ptr<!rec_A2> {{.*}}) -> ()
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// CIR-BEFORE-LPP: %[[OBJ2:.*]] = cir.get_global @a2 : !cir.ptr<!rec_A2>
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// CIR-BEFORE-LPP: }
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// Test case 'b' - before LoweringPrepare
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// CIR-BEFORE-LPP: cir.global external @b = ctor : !rec_B {
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// CIR-BEFORE-LPP: %[[OBJ:.*]] = cir.get_global @b : !cir.ptr<!rec_B>
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// CIR-BEFORE-LPP: cir.call @_ZN1BC1Ev(%[[OBJ]]) : (!cir.ptr<!rec_B> {{.*}}) -> ()
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// CIR-BEFORE-LPP: }
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// Test case 'c' - before LoweringPrepare (internal linkage)
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// CIR-BEFORE-LPP: cir.global {{.*}} internal {{.*}} @_ZL1c = ctor : !rec_C {
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// CIR-BEFORE-LPP: %[[OBJ:.*]] = cir.get_global @_ZL1c : !cir.ptr<!rec_C>
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// CIR-BEFORE-LPP: cir.call @_ZN1CC1Ev(%[[OBJ]]) : (!cir.ptr<!rec_C> {{.*}}) -> ()
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// CIR-BEFORE-LPP: %[[OBJ2:.*]] = cir.get_global @_ZL1c : !cir.ptr<!rec_C>
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// CIR-BEFORE-LPP: }
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// Check all globals first (they appear at the top of LLVM/OGCG output)
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// LLVM: @a ={{.*}} global {{.*}} zeroinitializer
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// LLVM: @a2 ={{.*}} global {{.*}} zeroinitializer
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// LLVM: @b ={{.*}} global {{.*}} zeroinitializer
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// LLVM: @_ZL1c ={{.*}} global {{.*}} zeroinitializer
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// OGCG: @a ={{.*}} global {{.*}} zeroinitializer
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// OGCG: @a2 ={{.*}} global {{.*}} zeroinitializer
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// OGCG: @b ={{.*}} global {{.*}} zeroinitializer
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// OGCG: @_ZL1c ={{.*}} global {{.*}} zeroinitializer
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// Test case 'a' - should have constant storage
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// CIR checks for 'a'
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// CIR: cir.global external @a = #cir.zero : !rec_A
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// CIR: cir.func internal private @__cxx_global_var_init() {
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// CIR: %[[OBJ:.*]] = cir.get_global @a : !cir.ptr<!rec_A>
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// CIR: cir.call @_ZN1AC1Ev(%[[OBJ]]) : (!cir.ptr<!rec_A> {{.*}}) -> ()
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// CIR: cir.return
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// CIR: }
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// LLVM checks for 'a' (no optimization)
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// LLVM: define internal void @__cxx_global_var_init() {
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// LLVM: call void @_ZN1AC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a)
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// LLVM: ret void
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// LLVM: }
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// OGCG checks for 'a' (no optimization)
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// OGCG: define internal void @__cxx_global_var_init() {{.*}} section ".text.startup" {
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// OGCG: call void @_ZN1AC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a)
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// OGCG: ret void
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// OGCG: }
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// Test case 'a2' - should have constant storage (constexpr dtor)
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// CIR checks for 'a2'
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// CIR: cir.global external @a2 = #cir.zero : !rec_A2
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// CIR: cir.func internal private @__cxx_global_var_init.1() {
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// CIR: %[[OBJ:.*]] = cir.get_global @a2 : !cir.ptr<!rec_A2>
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// CIR: cir.call @_ZN2A2C1Ev(%[[OBJ]]) : (!cir.ptr<!rec_A2> {{.*}}) -> ()
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// CIR: cir.return
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// CIR: }
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// LLVM checks for 'a2' (no optimization)
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// LLVM: define internal void @__cxx_global_var_init.1() {
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// LLVM: call void @_ZN2A2C1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a2)
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// LLVM: ret void
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// LLVM: }
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// OGCG checks for 'a2' (no optimization)
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// OGCG: define internal void @__cxx_global_var_init.1() {{.*}} section ".text.startup" {
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// OGCG: call void @_ZN2A2C1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a2)
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// OGCG: ret void
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// OGCG: }
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// Test case 'b' - should NOT have constant storage (mutable member)
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// CIR checks for 'b'
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// CIR: cir.global external @b = #cir.zero : !rec_B
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// CIR: cir.func internal private @__cxx_global_var_init.2() {
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// CIR: %[[OBJ:.*]] = cir.get_global @b : !cir.ptr<!rec_B>
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// CIR: cir.call @_ZN1BC1Ev(%[[OBJ]]) : (!cir.ptr<!rec_B> {{.*}}) -> ()
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// CIR: cir.return
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// CIR: }
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// LLVM checks for 'b' (no optimization)
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// LLVM: define internal void @__cxx_global_var_init.2() {
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// LLVM: call void @_ZN1BC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @b)
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// LLVM: ret void
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// LLVM: }
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// OGCG checks for 'b' (no optimization)
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// OGCG: define internal void @__cxx_global_var_init.2() {{.*}} section ".text.startup" {
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// OGCG: call void @_ZN1BC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @b)
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// OGCG: ret void
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// OGCG: }
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// Test case 'c' - Andy's simple case, should have constant storage (internal linkage)
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// CIR checks for 'c'
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// CIR: cir.global {{.*}} internal {{.*}} @_ZL1c = #cir.zero : !rec_C
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// CIR: cir.func internal private @__cxx_global_var_init.3() {
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// CIR: %[[OBJ:.*]] = cir.get_global @_ZL1c : !cir.ptr<!rec_C>
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// CIR: cir.call @_ZN1CC1Ev(%[[OBJ]]) : (!cir.ptr<!rec_C> {{.*}}) -> ()
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// CIR: cir.return
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// CIR: }
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// LLVM checks for 'c' (no optimization)
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// LLVM: define internal void @__cxx_global_var_init.3() {
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// LLVM: call void @_ZN1CC1Ev(ptr noundef nonnull align 4 dereferenceable(8) @_ZL1c)
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// LLVM: ret void
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// LLVM: }
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// OGCG checks for 'c' (no optimization)
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// OGCG: define internal void @__cxx_global_var_init.3() {{.*}} section ".text.startup" {
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// OGCG: call void @_ZN1CC1Ev(ptr noundef nonnull align 4 dereferenceable(8) @_ZL1c)
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// OGCG: ret void
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// OGCG: }
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// With optimization enabled, should emit invariant.start intrinsic for constant storage cases
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// Check all globals first (they appear at the top of optimized LLVM/OGCG output)
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// LLVM-OPT: @a ={{.*}} global {{.*}} zeroinitializer
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// LLVM-OPT: @a2 ={{.*}} global {{.*}} zeroinitializer
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// LLVM-OPT: @b ={{.*}} global {{.*}} zeroinitializer
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// LLVM-OPT: @_ZL1c ={{.*}} global {{.*}} zeroinitializer
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// OGCG-OPT: @a ={{.*}} global {{.*}} zeroinitializer
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// OGCG-OPT: @a2 ={{.*}} global {{.*}} zeroinitializer
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// OGCG-OPT: @b ={{.*}} global {{.*}} zeroinitializer
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// OGCG-OPT: @_ZL1c ={{.*}} global {{.*}} zeroinitializer
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// Test case 'a' - optimized checks
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// LLVM-OPT: define internal void @__cxx_global_var_init() {
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// LLVM-OPT: call void @_ZN1AC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a)
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// LLVM-OPT: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @a)
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// LLVM-OPT: ret void
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// LLVM-OPT: }
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// OGCG-OPT: define internal void @__cxx_global_var_init() {{.*}} section ".text.startup" {
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// OGCG-OPT: call void @_ZN1AC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a)
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// OGCG-OPT: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @a)
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// OGCG-OPT: ret void
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// OGCG-OPT: }
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// Test case 'a2' - optimized checks
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// LLVM-OPT: define internal void @__cxx_global_var_init.1() {
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// LLVM-OPT: call void @_ZN2A2C1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a2)
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// LLVM-OPT: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @a2)
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// LLVM-OPT: ret void
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// LLVM-OPT: }
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// OGCG-OPT: define internal void @__cxx_global_var_init.1() {{.*}} section ".text.startup" {
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// OGCG-OPT: call void @_ZN2A2C1Ev(ptr noundef nonnull align 4 dereferenceable(4) @a2)
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// OGCG-OPT: call {{.*}}@llvm.invariant.start.p0(i64 4, ptr @a2)
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// OGCG-OPT: ret void
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// OGCG-OPT: }
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// Test case 'b' - optimized checks (should NOT emit invariant.start)
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// LLVM-OPT: define internal void @__cxx_global_var_init.2() {
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// LLVM-OPT: call void @_ZN1BC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @b)
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// LLVM-OPT-NOT: call {{.*}}@llvm.invariant.start.p0(i64 {{.*}}, ptr @b)
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// LLVM-OPT: ret void
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// LLVM-OPT: }
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// OGCG-OPT: define internal void @__cxx_global_var_init.2() {{.*}} section ".text.startup" {
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// OGCG-OPT: call void @_ZN1BC1Ev(ptr noundef nonnull align 4 dereferenceable(4) @b)
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// OGCG-OPT-NOT: call {{.*}}@llvm.invariant.start.p0(i64 {{.*}}, ptr @b)
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// OGCG-OPT: ret void
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// OGCG-OPT: }
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// Test case 'c' - optimized checks
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// LLVM-OPT: define internal void @__cxx_global_var_init.3() {
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// LLVM-OPT: call void @_ZN1CC1Ev(ptr noundef nonnull align 4 dereferenceable(8) @_ZL1c)
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// LLVM-OPT: call {{.*}}@llvm.invariant.start.p0(i64 8, ptr @_ZL1c)
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// LLVM-OPT: ret void
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// LLVM-OPT: }
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// OGCG-OPT: define internal void @__cxx_global_var_init.3() {{.*}} section ".text.startup" {
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// OGCG-OPT: call void @_ZN1CC1Ev(ptr noundef nonnull align 4 dereferenceable(8) @_ZL1c)
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// OGCG-OPT: call {{.*}}@llvm.invariant.start.p0(i64 8, ptr @_ZL1c)
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// OGCG-OPT: ret void
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// OGCG-OPT: }
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// CIR checks at -O1 - should include invariant.start intrinsic calls for constant storage cases
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// CIR-O1: module {{.*}} attributes {{.*}} cir.opt_info = #cir.opt_info<level = 1
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// Test case 'a' - CIR at -O1
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// CIR-O1: cir.func internal private @__cxx_global_var_init() {
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// CIR-O1: cir.call @_ZN1AC1Ev(%{{.*}}) : (!cir.ptr<!rec_A> {{.*}}) -> ()
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// CIR-O1: cir.call_llvm_intrinsic "invariant.start" {{.*}} : (!s64i, !cir.ptr<!rec_A>) -> !cir.ptr<!rec_A>
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// CIR-O1: }
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// Test case 'a2' - CIR at -O1
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// CIR-O1: cir.func internal private @__cxx_global_var_init.1() {
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// CIR-O1: cir.call @_ZN2A2C1Ev(%{{.*}}) : (!cir.ptr<!rec_A2> {{.*}}) -> ()
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// CIR-O1: cir.call_llvm_intrinsic "invariant.start" {{.*}} : (!s64i, !cir.ptr<!rec_A2>) -> !cir.ptr<!rec_A2>
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// CIR-O1: }
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// Test case 'b' - CIR at -O1 (should NOT emit invariant.start)
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// CIR-O1: cir.func internal private @__cxx_global_var_init.2() {
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// CIR-O1: cir.call @_ZN1BC1Ev(%{{.*}}) : (!cir.ptr<!rec_B> {{.*}}) -> ()
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// CIR-O1-NOT: cir.call_llvm_intrinsic "invariant.start"
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// CIR-O1: }
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// Test case 'c' - CIR at -O1
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// CIR-O1: cir.func internal private @__cxx_global_var_init.3() {
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// CIR-O1: cir.call @_ZN1CC1Ev(%{{.*}}) : (!cir.ptr<!rec_C> {{.*}}) -> ()
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// CIR-O1: cir.call_llvm_intrinsic "invariant.start" {{.*}} : (!s64i, !cir.ptr<!rec_C>) -> !cir.ptr<!rec_C>
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// CIR-O1: }
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