aedd4e0850
This adds the handling for the case where the address of a static local variable is used to initialize another static local. In this case, the address of the first variable is emitted as a constant in the initializer of the second variable.
78 lines
3.5 KiB
C++
78 lines
3.5 KiB
C++
// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -mmlir --mlir-print-ir-before=cir-lowering-prepare %s -o %t.cir 2>&1 | FileCheck %s --check-prefix=CIR-BEFORE-LPP
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// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir %s -o - | FileCheck %s --check-prefix=CIR
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// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-linux-gnu -fclangir -emit-llvm %s -o - | FileCheck %s --check-prefix=LLVM
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// RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=OGCG
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void use_static_decl() {
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static int x = 42;
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static int *p = &x;
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}
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// CIR-DAG: cir.global "private" internal dso_local @_ZZ15use_static_declvE1p = #cir.global_view<@_ZZ15use_static_declvE1x> : !cir.ptr<!s32i>
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// CIR-DAG: cir.global "private" internal dso_local @_ZZ15use_static_declvE1x = #cir.int<42> : !s32i
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// LLVM-DAG: @_ZZ15use_static_declvE1p = internal global ptr @_ZZ15use_static_declvE1x
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// LLVM-DAG: @_ZZ15use_static_declvE1x = internal global i32 42
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// OGCG-DAG: @_ZZ15use_static_declvE1x = internal global i32 42
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// OGCG-DAG: @_ZZ15use_static_declvE1p = internal global ptr @_ZZ15use_static_declvE1x
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class A {
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public:
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A();
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};
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void use(A*);
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void f() {
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static A a;
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use(&a);
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}
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// CIR-BEFORE-LPP: cir.global "private" internal dso_local static_local_guard<"_ZGVZ1fvE1a"> @_ZZ1fvE1a = ctor : !rec_A {
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// CIR-BEFORE-LPP: %[[ADDR:.*]] = cir.get_global static_local @_ZZ1fvE1a : !cir.ptr<!rec_A>
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// CIR-BEFORE-LPP: cir.call @_ZN1AC1Ev(%[[ADDR]]) : (!cir.ptr<!rec_A> {{.*}}) -> ()
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// CIR-BEFORE-LPP: } {alignment = 1 : i64, ast = #cir.var.decl.ast}
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// CIR-BEFORE-LPP: cir.func no_inline dso_local @_Z1fv()
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// CIR-BEFORE-LPP: %[[VAR:.*]] = cir.get_global static_local @_ZZ1fvE1a : !cir.ptr<!rec_A>
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// CIR-BEFORE-LPP: cir.call @_Z3useP1A(%[[VAR]])
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// CIR-BEFORE-LPP: cir.return
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// CIR-DAG: cir.global "private" internal dso_local @_ZGVZ1fvE1a = #cir.int<0> : !s64i
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// CIR: cir.func{{.*}}@_Z1fv()
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// CIR: %[[ADDR:.*]] = cir.get_global static_local @_ZZ1fvE1a : !cir.ptr<!rec_A>
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// CIR: %[[GUARD:.*]] = cir.get_global @_ZGVZ1fvE1a : !cir.ptr<!s64i>
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// CIR: %[[GUARD_BYTE_PTR:.*]] = cir.cast bitcast %[[GUARD]] : !cir.ptr<!s64i> -> !cir.ptr<!s8i>
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// CIR: %[[GUARD_LOAD:.*]] = cir.load{{.*}}%[[GUARD_BYTE_PTR]]
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// CIR: %[[ZERO:.*]] = cir.const #cir.int<0>
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// CIR: %[[IS_UNINIT:.*]] = cir.cmp eq %[[GUARD_LOAD]], %[[ZERO]]
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// CIR: cir.if %[[IS_UNINIT]]
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// CIR: cir.call @__cxa_guard_acquire
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// CIR: cir.if
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// CIR: cir.call @_ZN1AC1Ev
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// CIR: cir.call @__cxa_guard_release
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// CIR: cir.call @_Z3useP1A(%[[ADDR]])
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// CIR: cir.return
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// LLVM-DAG: @_ZGVZ1fvE1a = internal global i64 0
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// LLVM: define{{.*}}void @_Z1fv()
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// LLVM: %[[GUARD:.*]] = load atomic i8, ptr @_ZGVZ1fvE1a acquire
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// LLVM: %[[IS_UNINIT:.*]] = icmp eq i8 %[[GUARD]], 0
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// LLVM: br i1 %[[IS_UNINIT]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
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// LLVM: call i32 @__cxa_guard_acquire
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// LLVM: call void @_ZN1AC1Ev
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// LLVM: call void @__cxa_guard_release
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// LLVM: call void @_Z3useP1A(ptr {{.*}}@_ZZ1fvE1a)
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// LLVM: ret void
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// OGCG-DAG: @_ZGVZ1fvE1a = internal global i64 0
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// OGCG: define{{.*}}void @_Z1fv()
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// OGCG: %[[GUARD:.*]] = load atomic i8, ptr @_ZGVZ1fvE1a acquire
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// OGCG: %[[IS_UNINIT:.*]] = icmp eq i8 %[[GUARD]], 0
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// OGCG: br i1 %[[IS_UNINIT]]
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// OGCG: call i32 @__cxa_guard_acquire
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// OGCG: call void @_ZN1AC1Ev
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// OGCG: call void @__cxa_guard_release
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// OGCG: call void @_Z3useP1A(ptr {{.*}}@_ZZ1fvE1a)
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// OGCG: ret void
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