| // RUN: %clang_cc1 -emit-llvm -triple=wasm32-unknown-unknown -o - %s \ |
| // RUN: | FileCheck %s -check-prefix=WEBASSEMBLY32 |
| // RUN: %clang_cc1 -emit-llvm -triple=wasm64-unknown-unknown -o - %s \ |
| // RUN: | FileCheck %s -check-prefix=WEBASSEMBLY64 |
| |
| // Test that we don't create common blocks. |
| int tentative; |
| // WEBASSEMBLY32: @tentative = global i32 0, align 4 |
| // WEBASSEMBLY64: @tentative = global i32 0, align 4 |
| |
| // Test that WebAssembly uses the ARM-style ABI in which the static |
| // variable's guard variable is tested via "load i8 and test the |
| // bottom bit" rather than the Itanium/x86 ABI which uses "load i8 |
| // and compare with zero". |
| int f(); |
| void g() { |
| static int a = f(); |
| } |
| // WEBASSEMBLY32-LABEL: @_Z1gv() |
| // WEBASSEMBLY32: %[[R0:.+]] = load atomic i8, i8* bitcast (i32* @_ZGVZ1gvE1a to i8*) acquire, align 4 |
| // WEBASSEMBLY32-NEXT: %[[R1:.+]] = and i8 %[[R0]], 1 |
| // WEBASSEMBLY32-NEXT: %[[R2:.+]] = icmp eq i8 %[[R1]], 0 |
| // WEBASSEMBLY32-NEXT: br i1 %[[R2]], label %[[CHECK:.+]], label %[[END:.+]], |
| // WEBASSEMBLY32: [[CHECK]] |
| // WEBASSEMBLY32: call i32 @__cxa_guard_acquire |
| // WEBASSEMBLY32: [[END]] |
| // WEBASSEMBLY32: call void @__cxa_guard_release |
| // |
| // WEBASSEMBLY64-LABEL: @_Z1gv() |
| // WEBASSEMBLY64: %[[R0:.+]] = load atomic i8, i8* bitcast (i64* @_ZGVZ1gvE1a to i8*) acquire, align 8 |
| // WEBASSEMBLY64-NEXT: %[[R1:.+]] = and i8 %[[R0]], 1 |
| // WEBASSEMBLY64-NEXT: %[[R2:.+]] = icmp eq i8 %[[R1]], 0 |
| // WEBASSEMBLY64-NEXT: br i1 %[[R2]], label %[[CHECK:.+]], label %[[END:.+]], |
| // WEBASSEMBLY64: [[CHECK]] |
| // WEBASSEMBLY64: call i32 @__cxa_guard_acquire |
| // WEBASSEMBLY64: [[END]] |
| // WEBASSEMBLY64: call void @__cxa_guard_release |
| |
| // Test various aspects of static constructor calls. |
| struct A { |
| A(); |
| }; |
| |
| A theA; |
| |
| // WEBASSEMBLY32: define internal void @__cxx_global_var_init() #3 { |
| // WEBASSEMBLY32: call %struct.A* @_ZN1AC1Ev(%struct.A* @theA) |
| // WEBASSEMBLY32: define internal void @_GLOBAL__sub_I_static_init_wasm.cpp() #3 { |
| // WEBASSEMBLY32: call void @__cxx_global_var_init() |
| // |
| // WEBASSEMBLY64: define internal void @__cxx_global_var_init() #3 { |
| // WEBASSEMBLY64: call %struct.A* @_ZN1AC1Ev(%struct.A* @theA) |
| // WEBASSEMBLY64: define internal void @_GLOBAL__sub_I_static_init_wasm.cpp() #3 { |
| // WEBASSEMBLY64: call void @__cxx_global_var_init() |
