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02c638e450
The usual default of "dmb ish" (inner-shareable) isn't even a valid instruction on v6M or v7M (well, it does the same thing but software is strongly discouraged from using it) so we should emit a full-system barrier there. llvm-svn: 189483
14 lines
379 B
LLVM
14 lines
379 B
LLVM
; RUN: llc < %s -mtriple=thumbv6-apple-darwin | FileCheck %s -check-prefix=V6
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; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mattr=-db | FileCheck %s -check-prefix=V6
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; RUN: llc < %s -march=thumb -mcpu=cortex-m0 | FileCheck %s -check-prefix=V6M
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define void @t1() {
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; V6-LABEL: t1:
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; V6: blx {{_*}}sync_synchronize
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; V6M-LABEL: t1:
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; V6M: dmb sy
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fence seq_cst
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ret void
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}
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