forked from OSchip/llvm-project
48 lines
1.9 KiB
LLVM
48 lines
1.9 KiB
LLVM
; RUN: llc < %s | FileCheck %s --check-prefix NOATOMIC
|
|
; RUN: not llc < %s -mtriple=wasm32-unknown-unknown -mattr=+atomics,+sign-ext 2>&1 | FileCheck %s --check-prefixes NOEMSCRIPTEN
|
|
; RUN: not llc < %s -mtriple=wasm32-unknown-wasi -mattr=+atomics,+sign-ext 2>&1 | FileCheck %s --check-prefixes NOEMSCRIPTEN
|
|
; RUN: llc < %s -mtriple=wasm32-unknown-emscripten -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -mattr=+atomics,+sign-ext | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
|
|
target triple = "wasm32-unknown-unknown"
|
|
|
|
; NOEMSCRIPTEN: LLVM ERROR: ATOMIC_FENCE is not yet supported in non-emscripten OSes
|
|
|
|
; A multithread fence turns into 'global.get $__stack_pointer' followed by an
|
|
; idempotent atomicrmw instruction.
|
|
; CHECK-LABEL: multithread_fence:
|
|
; CHECK: global.get $push[[SP:[0-9]+]]=, __stack_pointer
|
|
; CHECK-NEXT: i32.const $push[[ZERO:[0-9]+]]=, 0
|
|
; CHECK-NEXT: i32.atomic.rmw.or $drop=, 0($pop[[SP]]), $pop[[ZERO]]
|
|
; NOATOMIC-NOT: i32.atomic.rmw.or
|
|
define void @multithread_fence() {
|
|
fence seq_cst
|
|
ret void
|
|
}
|
|
|
|
; Fences with weaker memory orderings than seq_cst should be treated the same
|
|
; because atomic memory access in wasm are sequentially consistent.
|
|
; CHECK-LABEL: multithread_weak_fence:
|
|
; CHECK: global.get $push{{.+}}=, __stack_pointer
|
|
; CHECK: i32.atomic.rmw.or
|
|
; CHECK: i32.atomic.rmw.or
|
|
; CHECK: i32.atomic.rmw.or
|
|
define void @multithread_weak_fence() {
|
|
fence acquire
|
|
fence release
|
|
fence acq_rel
|
|
ret void
|
|
}
|
|
|
|
; A singlethread fence becomes compiler_fence instruction, a pseudo instruction
|
|
; that acts as a compiler barrier. The barrier should not be emitted to .s file.
|
|
; CHECK-LABEL: singlethread_fence:
|
|
; CHECK-NOT: compiler_fence
|
|
define void @singlethread_fence() {
|
|
fence syncscope("singlethread") seq_cst
|
|
fence syncscope("singlethread") acquire
|
|
fence syncscope("singlethread") release
|
|
fence syncscope("singlethread") acq_rel
|
|
ret void
|
|
}
|