90d79e258e
This was reverted in f985a8826b. Since that,
the default WMO lowering has moved to A67 compatible, the ABI attribute
emission has landed (off by default), and the LLD change to merge said
attributes have landed. Our ztso lowering is believed to also be A67
compatible, and no known issues remain.
Original commit message:
Ztso 1.0 was ratified in January 2023.
Documentation:
https://github.com/riscv/riscv-isa-manual/blob/main/src/ztso-st-ext.adoc
101 lines
2.6 KiB
LLVM
101 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
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; RUN: | FileCheck --check-prefixes=CHECK,WMO %s
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; RUN: llc -mtriple=riscv32 -mattr=+a -verify-machineinstrs < %s \
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; RUN: | FileCheck --check-prefixes=CHECK,WMO %s
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; RUN: llc -mtriple=riscv32 -mattr=+a,+ztso -verify-machineinstrs < %s \
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; RUN: | FileCheck --check-prefixes=CHECK,TSO %s
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; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
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; RUN: | FileCheck --check-prefixes=CHECK,WMO %s
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; RUN: llc -mtriple=riscv64 -mattr=+a -verify-machineinstrs < %s \
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; RUN: | FileCheck --check-prefixes=CHECK,WMO %s
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; RUN: llc -mtriple=riscv64 -mattr=+a,+ztso -verify-machineinstrs < %s \
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; RUN: | FileCheck --check-prefixes=CHECK,TSO %s
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define void @fence_acquire() nounwind {
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; WMO-LABEL: fence_acquire:
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; WMO: # %bb.0:
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; WMO-NEXT: fence r, rw
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; WMO-NEXT: ret
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;
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; TSO-LABEL: fence_acquire:
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; TSO: # %bb.0:
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; TSO-NEXT: #MEMBARRIER
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; TSO-NEXT: ret
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fence acquire
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ret void
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}
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define void @fence_release() nounwind {
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; WMO-LABEL: fence_release:
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; WMO: # %bb.0:
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; WMO-NEXT: fence rw, w
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; WMO-NEXT: ret
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;
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; TSO-LABEL: fence_release:
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; TSO: # %bb.0:
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; TSO-NEXT: #MEMBARRIER
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; TSO-NEXT: ret
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fence release
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ret void
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}
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define void @fence_acq_rel() nounwind {
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; WMO-LABEL: fence_acq_rel:
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; WMO: # %bb.0:
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; WMO-NEXT: fence.tso
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; WMO-NEXT: ret
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;
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; TSO-LABEL: fence_acq_rel:
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; TSO: # %bb.0:
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; TSO-NEXT: #MEMBARRIER
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; TSO-NEXT: ret
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fence acq_rel
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ret void
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}
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define void @fence_seq_cst() nounwind {
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; CHECK-LABEL: fence_seq_cst:
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; CHECK: # %bb.0:
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; CHECK-NEXT: fence rw, rw
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; CHECK-NEXT: ret
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fence seq_cst
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ret void
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}
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define void @fence_singlethread_acquire() nounwind {
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; CHECK-LABEL: fence_singlethread_acquire:
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; CHECK: # %bb.0:
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; CHECK-NEXT: #MEMBARRIER
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; CHECK-NEXT: ret
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fence syncscope("singlethread") acquire
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ret void
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}
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define void @fence_singlethread_release() nounwind {
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; CHECK-LABEL: fence_singlethread_release:
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; CHECK: # %bb.0:
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; CHECK-NEXT: #MEMBARRIER
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; CHECK-NEXT: ret
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fence syncscope("singlethread") release
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ret void
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}
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define void @fence_singlethread_acq_rel() nounwind {
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; CHECK-LABEL: fence_singlethread_acq_rel:
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; CHECK: # %bb.0:
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; CHECK-NEXT: #MEMBARRIER
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; CHECK-NEXT: ret
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fence syncscope("singlethread") acq_rel
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ret void
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}
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define void @fence_singlethread_seq_cst() nounwind {
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; CHECK-LABEL: fence_singlethread_seq_cst:
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; CHECK: # %bb.0:
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; CHECK-NEXT: #MEMBARRIER
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; CHECK-NEXT: ret
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fence syncscope("singlethread") seq_cst
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ret void
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}
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