| # 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, |
| # memory.atomic.notify and i32.add will be reordered by register stackify pass |
| # to meet 'call @foo''s requirements. But because we have fences between |
| # memory.atomic.notify and i32.add, they cannot be reordered, and local.set and |
| # local.get are inserted to save and load memory.atomic.notify's return value. |
| |
| --- | |
| 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 = MEMORY_ATOMIC_NOTIFY_A32 |
| ; CHECK: LOCAL_SET_I32 [[LOCAL:[0-9]+]], %[[REG]] |
| ; CHECK: COMPILER_FENCE |
| ; CHECK: ADD_I32 |
| ; CHECK: LOCAL_GET_I32 [[LOCAL]] |
| ; CHECK: CALL @foo |
| |
| liveins: $arguments |
| %0:i32 = CONST_I32 0, implicit-def $arguments |
| %1:i32 = MEMORY_ATOMIC_NOTIFY_A32 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 @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 = MEMORY_ATOMIC_NOTIFY_A32 |
| ; CHECK: LOCAL_SET_I32 [[LOCAL:[0-9]+]], %[[REG]] |
| ; CHECK: ATOMIC_FENCE |
| ; CHECK: ADD_I32 |
| ; CHECK: LOCAL_GET_I32 [[LOCAL]] |
| ; CHECK: CALL @foo |
| |
| liveins: $arguments |
| %0:i32 = CONST_I32 0, implicit-def $arguments |
| %1:i32 = MEMORY_ATOMIC_NOTIFY_A32 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 @foo, %2:i32, %1:i32, implicit-def $arguments |
| RETURN implicit-def $arguments |
| ... |