1 // RUN: %clang_cc1 -emit-llvm -triple=wasm32-unknown-unknown -o - %s \ 2 // RUN: | FileCheck %s -check-prefix=WEBASSEMBLY32 3 // RUN: %clang_cc1 -emit-llvm -triple=wasm64-unknown-unknown -o - %s \ 4 // RUN: | FileCheck %s -check-prefix=WEBASSEMBLY64 5 6 // Test that we don't create common blocks. 7 int tentative; 8 // WEBASSEMBLY32: @tentative = global i32 0, align 4 9 // WEBASSEMBLY64: @tentative = global i32 0, align 4 10 11 // Test that WebAssembly uses the ARM-style ABI in which the static 12 // variable's guard variable is tested via "load i8 and test the 13 // bottom bit" rather than the Itanium/x86 ABI which uses "load i8 14 // and compare with zero". 15 int f(); 16 void g() { 17 static int a = f(); 18 } 19 // WEBASSEMBLY32-LABEL: @_Z1gv() 20 // WEBASSEMBLY32: %[[R0:.+]] = load atomic i8, i8* bitcast (i32* @_ZGVZ1gvE1a to i8*) acquire, align 4 21 // WEBASSEMBLY32-NEXT: %[[R1:.+]] = and i8 %[[R0]], 1 22 // WEBASSEMBLY32-NEXT: %[[R2:.+]] = icmp eq i8 %[[R1]], 0 23 // WEBASSEMBLY32-NEXT: br i1 %[[R2]], label %[[CHECK:.+]], label %[[END:.+]] 24 // WEBASSEMBLY32: [[CHECK]] 25 // WEBASSEMBLY32: call i32 @__cxa_guard_acquire 26 // WEBASSEMBLY32: [[END]] 27 // WEBASSEMBLY32: call void @__cxa_guard_release 28 // 29 // WEBASSEMBLY64-LABEL: @_Z1gv() 30 // WEBASSEMBLY64: %[[R0:.+]] = load atomic i8, i8* bitcast (i64* @_ZGVZ1gvE1a to i8*) acquire, align 8 31 // WEBASSEMBLY64-NEXT: %[[R1:.+]] = and i8 %[[R0]], 1 32 // WEBASSEMBLY64-NEXT: %[[R2:.+]] = icmp eq i8 %[[R1]], 0 33 // WEBASSEMBLY64-NEXT: br i1 %[[R2]], label %[[CHECK:.+]], label %[[END:.+]] 34 // WEBASSEMBLY64: [[CHECK]] 35 // WEBASSEMBLY64: call i32 @__cxa_guard_acquire 36 // WEBASSEMBLY64: [[END]] 37 // WEBASSEMBLY64: call void @__cxa_guard_release 38 39 // Test various aspects of static constructor calls. 40 struct A { 41 A(); 42 }; 43 44 A theA; 45 46 // WEBASSEMBLY32: define internal void @__cxx_global_var_init() #0 section ".text.__startup" { 47 // WEBASSEMBLY32: call %struct.A* @_ZN1AC1Ev(%struct.A* @theA) 48 // WEBASSEMBLY32: define internal void @_GLOBAL__sub_I_static_init_wasm.cpp() #0 section ".text.__startup" { 49 // WEBASSEMBLY32: call void @__cxx_global_var_init() 50 // 51 // WEBASSEMBLY64: define internal void @__cxx_global_var_init() #0 section ".text.__startup" { 52 // WEBASSEMBLY64: call %struct.A* @_ZN1AC1Ev(%struct.A* @theA) 53 // WEBASSEMBLY64: define internal void @_GLOBAL__sub_I_static_init_wasm.cpp() #0 section ".text.__startup" { 54 // WEBASSEMBLY64: call void @__cxx_global_var_init() 55
