1 ; REQUIRES: asserts 2 ; RUN: llc < %s -march=thumb -mcpu=swift -pre-RA-sched=source -join-globalcopies -enable-misched -verify-misched -debug-only=misched -o - 2>&1 > /dev/null | FileCheck %s 3 ; 4 ; Loop counter copies should be eliminated. 5 ; There is also a MUL here, but we don't care where it is scheduled. 6 ; CHECK: postinc 7 ; CHECK: *** Final schedule for BB#2 *** 8 ; CHECK: t2LDRs 9 ; CHECK: t2ADDrr 10 ; CHECK: t2CMPrr 11 ; CHECK: COPY 12 define i32 @postinc(i32 %a, i32* nocapture %d, i32 %s) nounwind { 13 entry: 14 %cmp4 = icmp eq i32 %a, 0 15 br i1 %cmp4, label %for.end, label %for.body 16 17 for.body: ; preds = %entry, %for.body 18 %indvars.iv = phi i32 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 19 %s.05 = phi i32 [ %mul, %for.body ], [ 0, %entry ] 20 %indvars.iv.next = add i32 %indvars.iv, %s 21 %arrayidx = getelementptr inbounds i32* %d, i32 %indvars.iv 22 %0 = load i32* %arrayidx, align 4 23 %mul = mul nsw i32 %0, %s.05 24 %exitcond = icmp eq i32 %indvars.iv.next, %a 25 br i1 %exitcond, label %for.end, label %for.body 26 27 for.end: ; preds = %for.body, %entry 28 %s.0.lcssa = phi i32 [ 0, %entry ], [ %mul, %for.body ] 29 ret i32 %s.0.lcssa 30 } 31 32 33 ; This case was a crasher in constrainLocalCopy. 34 ; The problem was the t2LDR_PRE defining both the global and local lrg. 35 ; CHECK-LABEL: *** Final schedule for BB#5 *** 36 ; CHECK: %[[R4:vreg[0-9]+]]<def>, %[[R1:vreg[0-9]+]]<def,tied2> = t2LDR_PRE %[[R1]]<tied1> 37 ; CHECK: %vreg{{[0-9]+}}<def> = COPY %[[R1]] 38 ; CHECK: %vreg{{[0-9]+}}<def> = COPY %[[R4]] 39 ; CHECK-LABEL: MACHINEINSTRS 40 %struct.rtx_def = type { [4 x i8], [1 x %union.rtunion_def] } 41 %union.rtunion_def = type { i64 } 42 43 ; Function Attrs: nounwind ssp 44 declare hidden fastcc void @df_ref_record(i32* nocapture, %struct.rtx_def*, %struct.rtx_def**, %struct.rtx_def*, i32, i32) #0 45 46 ; Function Attrs: nounwind ssp 47 define hidden fastcc void @df_def_record_1(i32* nocapture %df, %struct.rtx_def* %x, %struct.rtx_def* %insn) #0 { 48 entry: 49 br label %while.cond 50 51 while.cond: ; preds = %if.end28, %entry 52 %loc.0 = phi %struct.rtx_def** [ %rtx31, %if.end28 ], [ undef, %entry ] 53 %dst.0 = phi %struct.rtx_def* [ %0, %if.end28 ], [ undef, %entry ] 54 switch i32 undef, label %if.end47 [ 55 i32 61, label %if.then46 56 i32 64, label %if.then24 57 i32 132, label %if.end28 58 i32 133, label %if.end28 59 ] 60 61 if.then24: ; preds = %while.cond 62 br label %if.end28 63 64 if.end28: ; preds = %if.then24, %while.cond, %while.cond 65 %dst.1 = phi %struct.rtx_def* [ undef, %if.then24 ], [ %dst.0, %while.cond ], [ %dst.0, %while.cond ] 66 %arrayidx30 = getelementptr inbounds %struct.rtx_def* %dst.1, i32 0, i32 1, i32 0 67 %rtx31 = bitcast %union.rtunion_def* %arrayidx30 to %struct.rtx_def** 68 %0 = load %struct.rtx_def** %rtx31, align 4, !tbaa !0 69 br label %while.cond 70 71 if.then46: ; preds = %while.cond 72 tail call fastcc void @df_ref_record(i32* %df, %struct.rtx_def* %dst.0, %struct.rtx_def** %loc.0, %struct.rtx_def* %insn, i32 0, i32 undef) 73 unreachable 74 75 if.end47: ; preds = %while.cond 76 ret void 77 } 78 79 attributes #0 = { nounwind ssp } 80 81 !0 = metadata !{metadata !"any pointer", metadata !1} 82 !1 = metadata !{metadata !"omnipotent char", metadata !2} 83 !2 = metadata !{metadata !"Simple C/C++ TBAA"} 84
