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llvm-project/llvm/test/CodeGen/PowerPC/atomics-fences.ll

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[Power] Use lwsync for non-seq_cst fences Summary: hwsync is only required for seq_cst fences, acquire and release one can use the cheaper lwsync. Test Plan: Added some cases to atomics.ll + make check-all Reviewers: jfb, wschmidt Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D5317 llvm-svn: 218995
2014-10-04 02:04:36 +08:00
; RUN: llc < %s -mtriple=powerpc-apple-darwin -march=ppc32 -verify-machineinstrs | FileCheck %s --check-prefix=CHECK
; RUN: llc < %s -mtriple=powerpc-apple-darwin -march=ppc64 -verify-machineinstrs | FileCheck %s --check-prefix=CHECK
; RUN: llc < %s -mtriple=powerpc-apple-darwin -mcpu=440 | FileCheck %s --check-prefix=PPC440
; Fences
define void @fence_acquire() {
; CHECK-LABEL: fence_acquire
[PowerPC] Enable printing instructions using aliases TableGen had been nicely generating code to print a number of instructions using shorter aliases (and PowerPC has plenty of short mnemonics), but we were not calling it. For some of the aliases we support in the parser, TableGen can't infer the "inverse" alias relationship, so there is still more to do. Thus, after some hours of updating test cases... llvm-svn: 235616
2015-04-24 02:30:38 +08:00
; CHECK: lwsync
; PPC440-NOT: lwsync
[Power] Use lwsync for non-seq_cst fences Summary: hwsync is only required for seq_cst fences, acquire and release one can use the cheaper lwsync. Test Plan: Added some cases to atomics.ll + make check-all Reviewers: jfb, wschmidt Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D5317 llvm-svn: 218995
2014-10-04 02:04:36 +08:00
; PPC440: msync
fence acquire
ret void
}
define void @fence_release() {
; CHECK-LABEL: fence_release
[PowerPC] Enable printing instructions using aliases TableGen had been nicely generating code to print a number of instructions using shorter aliases (and PowerPC has plenty of short mnemonics), but we were not calling it. For some of the aliases we support in the parser, TableGen can't infer the "inverse" alias relationship, so there is still more to do. Thus, after some hours of updating test cases... llvm-svn: 235616
2015-04-24 02:30:38 +08:00
; CHECK: lwsync
; PPC440-NOT: lwsync
[Power] Use lwsync for non-seq_cst fences Summary: hwsync is only required for seq_cst fences, acquire and release one can use the cheaper lwsync. Test Plan: Added some cases to atomics.ll + make check-all Reviewers: jfb, wschmidt Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D5317 llvm-svn: 218995
2014-10-04 02:04:36 +08:00
; PPC440: msync
fence release
ret void
}
define void @fence_seq_cst() {
; CHECK-LABEL: fence_seq_cst
; CHECK: sync 0
; PPC440-NOT: sync 0
; PPC440: msync
fence seq_cst
ret void
}