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4741c1e622
addSchedBarrierDeps() is supposed to add use operands to the ExitSU node. The current implementation adds uses for calls/barrier instruction and the MBB live-outs in all other cases. The use operands of conditional jump instructions were missed. Also added code to macrofusion to set the latencies between nodes to zero to avoid problems with the fusing nodes lingering around in the pending list now. Differential Revision: https://reviews.llvm.org/D25140 llvm-svn: 286544
37 lines
1.1 KiB
LLVM
37 lines
1.1 KiB
LLVM
; RUN: llc -o - %s -mattr=+arith-cbz-fusion | FileCheck %s
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; RUN: llc -o - %s -mcpu=cyclone | FileCheck %s
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target triple = "arm64-apple-ios"
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declare void @foobar(i32 %v0, i32 %v1)
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; Make sure sub is scheduled in front of cbnz
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; CHECK-LABEL: test_sub_cbz:
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; CHECK: add w[[ADDRES:[0-9]+]], w1, #7
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; CHECK: sub w[[SUBRES:[0-9]+]], w0, #13
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; CHECK-NEXT: cbnz w[[SUBRES]], [[SKIPBLOCK:LBB[0-9_]+]]
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; CHECK: mov [[REGTY:[x,w]]]0, [[REGTY]][[ADDRES]]
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; CHECK: mov [[REGTY]]1, [[REGTY]][[SUBRES]]
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; CHECK: bl _foobar
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; CHECK: [[SKIPBLOCK]]:
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; CHECK: mov [[REGTY]]0, [[REGTY]][[SUBRES]]
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; CHECK: mov [[REGTY]]1, [[REGTY]][[ADDRES]]
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; CHECK: bl _foobar
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define void @test_sub_cbz(i32 %a0, i32 %a1) {
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entry:
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; except for the fusion opportunity the sub/add should be equal so the
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; scheduler would leave them in source order if it weren't for the scheduling
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%v0 = sub i32 %a0, 13
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%cond = icmp eq i32 %v0, 0
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%v1 = add i32 %a1, 7
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br i1 %cond, label %if, label %exit
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if:
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call void @foobar(i32 %v1, i32 %v0)
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br label %exit
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exit:
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call void @foobar(i32 %v0, i32 %v1)
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ret void
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}
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