46e58354da
Single-threaded fences aren't required to provide any synchronization with other processing elements so there's no need for a DMB. They should still be a barrier for compiler optimizations though. llvm-svn: 300904
17 lines
448 B
LLVM
17 lines
448 B
LLVM
; RUN: llc -mtriple=thumbv7-linux-gnueabihf %s -o - | FileCheck %s
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; RUN: llc -mtriple=thumbv7-apple-ios %s -o - | FileCheck %s
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; RUN: llc -mtriple=thumbv7-linux-gnueabihf %s -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=OBJ
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; OBJ-NOT: dmb
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define void @fence_singlethread() {
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; CHECK-LABEL: fence_singlethread:
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; CHECK-NOT: dmb
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; CHECK: @ COMPILER BARRIER
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; CHECK-NOT: dmb
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fence singlethread seq_cst
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ret void
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}
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