1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc -mtriple=aarch64 -mattr=+sve < %s | FileCheck %s 3 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: // %entry 11; CHECK-NEXT: whilelt p0.s, wzr, w0 12; CHECK-NEXT: b.pl .LBB0_3 13; CHECK-NEXT: // %bb.1: // %for.body.preheader 14; CHECK-NEXT: mov w8, wzr 15; CHECK-NEXT: cntw x9 16; CHECK-NEXT: .LBB0_2: // %for.body 17; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 18; CHECK-NEXT: whilelt p0.s, w8, w0 19; CHECK-NEXT: add w8, w8, w9 20; CHECK-NEXT: b.mi .LBB0_2 21; CHECK-NEXT: .LBB0_3: // %exit 22; CHECK-NEXT: ret 23entry: 24 %vscale = tail call i32 @llvm.vscale.i32() 25 %step = shl nuw nsw i32 %vscale, 2 26 %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 %exit 30 31for.body: 32 %i = phi i32 [ 0, %entry ], [ %i.next, %for.body ] 33 %i.next = add i32 %i, %step 34 %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 %exit 37 38exit: 39 ret void 40} 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