report_fatal_error("cannot use thread-local storage without bulk memory",
false);
+ // Currently Emscripten does not support dynamic linking with threads.
+ // Therefore, if we have thread-local storage, only the local-exec model
+ // is possible.
+ // TODO: remove this and implement proper TLS models once Emscripten
+ // supports dynamic linking with threads.
if (GA->getGlobal()->getThreadLocalMode() !=
- GlobalValue::LocalExecTLSModel) {
- report_fatal_error("only -ftls-model=local-exec is supported for now",
+ GlobalValue::LocalExecTLSModel &&
+ !Subtarget->getTargetTriple().isOSEmscripten()) {
+ report_fatal_error("only -ftls-model=local-exec is supported for now on "
+ "non-Emscripten OSes: variable " +
+ GA->getGlobal()->getName(),
false);
}
--- /dev/null
+; RUN: not llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -mattr=+bulk-memory 2>&1 | FileCheck %s --check-prefix=ERROR
+; RUN: not llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -mattr=+bulk-memory -fast-isel 2>&1 | FileCheck %s --check-prefix=ERROR
+; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -mattr=+bulk-memory --mtriple wasm32-unknown-emscripten | FileCheck %s --check-prefixes=CHECK,TLS
+; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -mattr=+bulk-memory --mtriple wasm32-unknown-emscripten -fast-isel | FileCheck %s --check-prefixes=CHECK,TLS
+; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -mattr=-bulk-memory | FileCheck %s --check-prefixes=CHECK,NO-TLS
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; ERROR: LLVM ERROR: only -ftls-model=local-exec is supported for now on non-Emscripten OSes: variable tls
+
+; CHECK-LABEL: address_of_tls:
+; CHECK-NEXT: .functype address_of_tls () -> (i32)
+define i32 @address_of_tls() {
+ ; TLS-DAG: global.get __tls_base
+ ; TLS-DAG: i32.const tls
+ ; TLS-NEXT: i32.add
+ ; TLS-NEXT: return
+
+ ; NO-TLS-NEXT: i32.const tls
+ ; NO-TLS-NEXT: return
+ ret i32 ptrtoint(i32* @tls to i32)
+}
+
+; CHECK-LABEL: ptr_to_tls:
+; CHECK-NEXT: .functype ptr_to_tls () -> (i32)
+define i32* @ptr_to_tls() {
+ ; TLS-DAG: global.get __tls_base
+ ; TLS-DAG: i32.const tls
+ ; TLS-NEXT: i32.add
+ ; TLS-NEXT: return
+
+ ; NO-TLS-NEXT: i32.const tls
+ ; NO-TLS-NEXT: return
+ ret i32* @tls
+}
+
+; CHECK-LABEL: tls_load:
+; CHECK-NEXT: .functype tls_load () -> (i32)
+define i32 @tls_load() {
+ ; TLS-DAG: global.get __tls_base
+ ; TLS-DAG: i32.const tls
+ ; TLS-NEXT: i32.add
+ ; TLS-NEXT: i32.load 0
+ ; TLS-NEXT: return
+
+ ; NO-TLS-NEXT: i32.const 0
+ ; NO-TLS-NEXT: i32.load tls
+ ; NO-TLS-NEXT: return
+ %tmp = load i32, i32* @tls, align 4
+ ret i32 %tmp
+}
+
+; CHECK-LABEL: tls_store:
+; CHECK-NEXT: .functype tls_store (i32) -> ()
+define void @tls_store(i32 %x) {
+ ; TLS-DAG: global.get __tls_base
+ ; TLS-DAG: i32.const tls
+ ; TLS-NEXT: i32.add
+ ; TLS-NEXT: i32.store 0
+ ; TLS-NEXT: return
+
+ ; NO-TLS-NEXT: i32.const 0
+ ; NO-TLS-NEXT: i32.store tls
+ ; NO-TLS-NEXT: return
+ store i32 %x, i32* @tls, align 4
+ ret void
+}
+
+; CHECK-LABEL: tls_size:
+; CHECK-NEXT: .functype tls_size () -> (i32)
+define i32 @tls_size() {
+; CHECK-NEXT: global.get __tls_size
+; CHECK-NEXT: return
+ %1 = call i32 @llvm.wasm.tls.size.i32()
+ ret i32 %1
+}
+
+; CHECK: .type tls,@object
+; TLS-NEXT: .section .tbss.tls,"",@
+; NO-TLS-NEXT: .section .bss.tls,"",@
+; CHECK-NEXT: .p2align 2
+; CHECK-NEXT: tls:
+; CHECK-NEXT: .int32 0
+@tls = internal thread_local global i32 0
+
+declare i32 @llvm.wasm.tls.size.i32()