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| # RUN: llc -mtriple=wasm32-unknown-unknown -run-pass wasm-reg-stackify -run-pass wasm-explicit-locals %s -o - | FileCheck %s
# In the two tests below, without compiler_fence or atomic.fence in between,
# atomic.notify and i32.add will be reordered by register stackify pass to meet
# 'call @foo''s requirements. But because we have fences between atomic.notify
# and i32.add, they cannot be reordered, and local.set and local.get are
# inserted to save and load atomic.notify's return value.
--- |
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
declare void @foo(i32, i32)
define void @compiler_fence_test(i32) {
ret void
}
define void @atomic_fence_test(i32) {
ret void
}
...
---
# CHECK-LABEL: name: compiler_fence_test
name: compiler_fence_test
liveins:
- { reg: '$arguments' }
tracksRegLiveness: true
body: |
bb.0:
; CHECK: %[[REG:[0-9]+]]:i32 = ATOMIC_NOTIFY
; CHECK: LOCAL_SET_I32 [[LOCAL:[0-9]+]], %[[REG]]
; CHECK: COMPILER_FENCE
; CHECK: ADD_I32
; CHECK: LOCAL_GET_I32 [[LOCAL]]
; CHECK: CALL_VOID @foo
liveins: $arguments
%0:i32 = CONST_I32 0, implicit-def $arguments
%1:i32 = ATOMIC_NOTIFY 2, 0, %0:i32, %0:i32, implicit-def $arguments
COMPILER_FENCE implicit-def $arguments
%2:i32 = ADD_I32 %0:i32, %0:i32, implicit-def $arguments
CALL_VOID @foo, %2:i32, %1:i32, implicit-def $arguments
RETURN implicit-def $arguments
...
---
# CHECK-LABEL: name: atomic_fence_test
name: atomic_fence_test
liveins:
- { reg: '$arguments' }
tracksRegLiveness: true
body: |
bb.0:
; CHECK: %[[REG:[0-9]+]]:i32 = ATOMIC_NOTIFY
; CHECK: LOCAL_SET_I32 [[LOCAL:[0-9]+]], %[[REG]]
; CHECK: ATOMIC_FENCE
; CHECK: ADD_I32
; CHECK: LOCAL_GET_I32 [[LOCAL]]
; CHECK: CALL_VOID @foo
liveins: $arguments
%0:i32 = CONST_I32 0, implicit-def $arguments
%1:i32 = ATOMIC_NOTIFY 2, 0, %0:i32, %0:i32, implicit-def $arguments
ATOMIC_FENCE 0, implicit-def $arguments
%2:i32 = ADD_I32 %0:i32, %0:i32, implicit-def $arguments
CALL_VOID @foo, %2:i32, %1:i32, implicit-def $arguments
RETURN implicit-def $arguments
...
|