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llvm-project/lld/test/wasm/tls-align.ll

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[WebAssembly] Initialize memory in start function Summary: - `__wasm_init_memory` is now the WebAssembly start function instead of being called from `__wasm_call_ctors` or called directly by the runtime. - Adds a new synthetic data symbol `__wasm_init_memory_flag` that is atomically incremented from zero to one by the thread responsible for initializing memory. - All threads now unconditionally perform data.drop on all passive segments. - Removes --passive-segments and --active-segments flags and controls segment type based on --shared-memory instead. The deleted flags were only present to ameliorate the upgrade path in Emscripten. Reviewers: sbc100, aheejin Subscribers: dschuff, jgravelle-google, sunfish, jfb, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D65783 llvm-svn: 370965
2019-09-05 03:50:39 +08:00
; RUN: llc -mattr=+bulk-memory,+atomics -filetype=obj %s -o %t.o
[WebAssembly] Compute and export TLS block alignment Summary: Add immutable WASM global `__tls_align` which stores the alignment requirements of the TLS segment. Add `__builtin_wasm_tls_align()` intrinsic to get this alignment in Clang. The expected usage has now changed to: __wasm_init_tls(memalign(__builtin_wasm_tls_align(), __builtin_wasm_tls_size())); Reviewers: tlively, aheejin, sbc100, sunfish, alexcrichton Reviewed By: tlively Subscribers: dschuff, jgravelle-google, hiraditya, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65028 llvm-svn: 366624
2019-07-20 07:34:16 +08:00
target triple = "wasm32-unknown-unknown"
@no_tls = global i32 0, align 4
@tls1 = thread_local(localexec) global i32 1, align 4
@tls2 = thread_local(localexec) global i32 1, align 16
define i32* @tls1_addr() {
ret i32* @tls1
}
define i32* @tls2_addr() {
ret i32* @tls2
}
; RUN: wasm-ld -no-gc-sections --shared-memory --max-memory=131072 --no-entry -o %t.wasm %t.o
; RUN: obj2yaml %t.wasm | FileCheck %s
; CHECK: - Type: GLOBAL
; CHECK-NEXT: Globals:
; CHECK-NEXT: - Index: 0
; CHECK-NEXT: Type: I32
; CHECK-NEXT: Mutable: true
; CHECK-NEXT: InitExpr:
; CHECK-NEXT: Opcode: I32_CONST
[WebAssembly] Sort output data sections to place .bss last Summary: This was always the intended behavior, but had not been implemented. This ordering is important for Emscripten when generating .mem files while compiling to JS, since only zeros at the end of initialized memory can be dropped. Fixes https://github.com/emscripten-core/emscripten/issues/8999 Reviewers: sbc100 Subscribers: dschuff, jgravelle-google, aheejin, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D67736 llvm-svn: 372284
2019-09-19 09:14:59 +08:00
; CHECK-NEXT: Value: 66592
[WebAssembly] Compute and export TLS block alignment Summary: Add immutable WASM global `__tls_align` which stores the alignment requirements of the TLS segment. Add `__builtin_wasm_tls_align()` intrinsic to get this alignment in Clang. The expected usage has now changed to: __wasm_init_tls(memalign(__builtin_wasm_tls_align(), __builtin_wasm_tls_size())); Reviewers: tlively, aheejin, sbc100, sunfish, alexcrichton Reviewed By: tlively Subscribers: dschuff, jgravelle-google, hiraditya, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65028 llvm-svn: 366624
2019-07-20 07:34:16 +08:00
; __tls_base
; CHECK-NEXT: - Index: 1
; CHECK-NEXT: Type: I32
; CHECK-NEXT: Mutable: true
; CHECK-NEXT: InitExpr:
; CHECK-NEXT: Opcode: I32_CONST
; CHECK-NEXT: Value: 0
; __tls_size
; CHECK-NEXT: - Index: 2
; CHECK-NEXT: Type: I32
; CHECK-NEXT: Mutable: false
; CHECK-NEXT: InitExpr:
; CHECK-NEXT: Opcode: I32_CONST
; CHECK-NEXT: Value: 20
; __tls_align
; CHECK-NEXT: - Index: 3
; CHECK-NEXT: Type: I32
; CHECK-NEXT: Mutable: false
; CHECK-NEXT: InitExpr:
; CHECK-NEXT: Opcode: I32_CONST
; CHECK-NEXT: Value: 16