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