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[Test][NFC] Add a new test to verify if scheduler can cluster two ld/st 

even with different preds
This commit is contained in:
QingShan Zhang 2020-08-18 09:40:37 +00:00
parent 13080ca1f0
commit 9b32ef9413
1 changed files with 25 additions and 0 deletions
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25
llvm/test/CodeGen/AArch64/aarch64-stp-cluster.ll
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@ -213,3 +213,28 @@ entry:
store i32 %add, i32* %arrayidx1, align 4
ret void
}
; FIXME - The SU(4) and SU(7) can be clustered even with
; different preds
; CHECK: ********** MI Scheduling **********
; CHECK-LABEL: cluster_with_different_preds:%bb.0
; CHECK-NOT:Cluster ld/st SU(4) - SU(7)
; CHECK:SU(3): STRWui %2:gpr32, %0:gpr64common, 0 ::
; CHECK:SU(4): %3:gpr32 = LDRWui %1:gpr64common, 0 ::
; CHECK:Predecessors:
; CHECK: SU(3): Ord Latency=1 Memory
; CHECK:SU(6): STRBBui %4:gpr32, %1:gpr64common, 4 ::
; CHECK:SU(7): %5:gpr32 = LDRWui %1:gpr64common, 1 ::
; CHECK:Predecessors:
; CHECK:SU(6): Ord Latency=1 Memory
define i32 @cluster_with_different_preds(i32* %p, i32* %q) {
entry:
store i32 3, i32* %p, align 4
%0 = load i32, i32* %q, align 4
%add.ptr = getelementptr inbounds i32, i32* %q, i64 1
%1 = bitcast i32* %add.ptr to i8*
store i8 5, i8* %1, align 1
%2 = load i32, i32* %add.ptr, align 4
%add = add nsw i32 %2, %0
ret i32 %add
}