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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc -mtriple=aarch64 -mattr=+sve < %s | FileCheck %s3 4;5; Ensure that the %ptrue from the preheader is sunk into the loop such that the ptest is removed.6;7 8define void @test_sink_ptrue_into_ptest(i32 %n) {9; CHECK-LABEL: test_sink_ptrue_into_ptest:10; CHECK: // %bb.0: // %entry11; CHECK-NEXT: whilelt p0.s, wzr, w012; CHECK-NEXT: b.pl .LBB0_313; CHECK-NEXT: // %bb.1: // %for.body.preheader14; CHECK-NEXT: mov w9, wzr15; CHECK-NEXT: cntw x816; CHECK-NEXT: .LBB0_2: // %for.body17; CHECK-NEXT: // =>This Inner Loop Header: Depth=118; CHECK-NEXT: whilelt p0.s, w9, w019; CHECK-NEXT: add w9, w9, w820; CHECK-NEXT: b.mi .LBB0_221; CHECK-NEXT: .LBB0_3: // %exit22; CHECK-NEXT: ret23entry:24 %vscale = tail call i32 @llvm.vscale.i32()25 %step = shl nuw nsw i32 %vscale, 226 %ptrue.ph = tail call <vscale x 4 x i1> @llvm.aarch64.sve.ptrue.nxv4i1(i32 31)27 %while.ph = tail call <vscale x 4 x i1> @llvm.aarch64.sve.whilelt.nxv4i1.i32(i32 0, i32 %n)28 %ptest.ph = tail call i1 @llvm.aarch64.sve.ptest.first.nxv4i1(<vscale x 4 x i1> %ptrue.ph, <vscale x 4 x i1> %while.ph)29 br i1 %ptest.ph, label %for.body, label %exit30 31for.body:32 %i = phi i32 [ 0, %entry ], [ %i.next, %for.body ]33 %i.next = add i32 %i, %step34 %while = call <vscale x 4 x i1> @llvm.aarch64.sve.whilelt.nxv4i1.i32(i32 %i, i32 %n)35 %ptest = call i1 @llvm.aarch64.sve.ptest.first.nxv4i1(<vscale x 4 x i1> %ptrue.ph, <vscale x 4 x i1> %while)36 br i1 %ptest, label %for.body, label %exit37 38exit:39 ret void40}41 42declare i32 @llvm.vscale.i32()43declare <vscale x 4 x i1> @llvm.aarch64.sve.ptrue.nxv4i1(i32 immarg)44declare <vscale x 4 x i1> @llvm.aarch64.sve.whilelt.nxv4i1.i32(i32, i32)45declare i1 @llvm.aarch64.sve.ptest.first.nxv4i1(<vscale x 4 x i1>, <vscale x 4 x i1>)46