1; RUN: llc < %s -regalloc=greedy -mcpu=cortex-a8 -relocation-model=pic -disable-fp-elim -verify-machineinstrs | FileCheck %s 2; 3; ARM tests that crash or fail with the greedy register allocator. 4 5target triple = "thumbv7-apple-darwin" 6 7declare double @exp(double) 8 9; CHECK: remat_subreg 10define void @remat_subreg(float* nocapture %x, i32* %y, i32 %n, i32 %z, float %c, float %lambda, float* nocapture %ret_f, float* nocapture %ret_df) nounwind { 11entry: 12 %conv16 = fpext float %lambda to double 13 %mul17 = fmul double %conv16, -1.000000e+00 14 br i1 undef, label %cond.end.us, label %cond.end 15 16cond.end.us: ; preds = %entry 17 unreachable 18 19cond.end: ; preds = %cond.end, %entry 20 %mul = fmul double undef, 0.000000e+00 21 %add = fadd double undef, %mul 22 %add46 = fadd double undef, undef 23 %add75 = fadd double 0.000000e+00, undef 24 br i1 undef, label %for.end, label %cond.end 25 26for.end: ; preds = %cond.end 27 %conv78 = sitofp i32 %z to double 28 %conv83 = fpext float %c to double 29 %mul84 = fmul double %mul17, %conv83 30 %call85 = tail call double @exp(double %mul84) nounwind 31 %mul86 = fmul double %conv78, %call85 32 %add88 = fadd double 0.000000e+00, %mul86 33; CHECK: bl _exp 34 %call100 = tail call double @exp(double %mul84) nounwind 35 %mul101 = fmul double undef, %call100 36 %add103 = fadd double %add46, %mul101 37 %mul111 = fmul double undef, %conv83 38 %mul119 = fmul double %mul111, undef 39 %add121 = fadd double undef, %mul119 40 %div = fdiv double 1.000000e+00, %conv16 41 %div126 = fdiv double %add, %add75 42 %sub = fsub double %div, %div126 43 %div129 = fdiv double %add103, %add88 44 %add130 = fadd double %sub, %div129 45 %conv131 = fptrunc double %add130 to float 46 store float %conv131, float* %ret_f, align 4 47 %mul139 = fmul double %div129, %div129 48 %div142 = fdiv double %add121, %add88 49 %sub143 = fsub double %mul139, %div142 50; %lambda is passed on the stack, and the stack slot load is rematerialized. 51; The rematted load of a float constrains the D register used for the mul. 52; CHECK: vldr 53 %mul146 = fmul float %lambda, %lambda 54 %conv147 = fpext float %mul146 to double 55 %div148 = fdiv double 1.000000e+00, %conv147 56 %sub149 = fsub double %sub143, %div148 57 %conv150 = fptrunc double %sub149 to float 58 store float %conv150, float* %ret_df, align 4 59 ret void 60} 61 62; CHECK: insert_elem 63; This test has a sub-register copy with a kill flag: 64; %vreg6:ssub_3<def> = COPY %vreg6:ssub_2<kill>; QPR_VFP2:%vreg6 65; The rewriter must do something sensible with that, or the scavenger crashes. 66define void @insert_elem() nounwind { 67entry: 68 br i1 undef, label %if.end251, label %if.then84 69 70if.then84: ; preds = %entry 71 br i1 undef, label %if.end251, label %if.then195 72 73if.then195: ; preds = %if.then84 74 %div = fdiv float 1.000000e+00, undef 75 %vecinit207 = insertelement <4 x float> undef, float %div, i32 1 76 %vecinit208 = insertelement <4 x float> %vecinit207, float 1.000000e+00, i32 2 77 %vecinit209 = insertelement <4 x float> %vecinit208, float 1.000000e+00, i32 3 78 %mul216 = fmul <4 x float> zeroinitializer, %vecinit209 79 store <4 x float> %mul216, <4 x float>* undef, align 16 80 br label %if.end251 81 82if.end251: ; preds = %if.then195, %if.then84, %entry 83 ret void 84} 85 86; Coalescer failure: removeCopyByCommutingDef leaves a bad kill flag 87; behind. 88define void @rdar11950722() nounwind readonly optsize ssp align 2 { 89entry: 90 br i1 undef, label %land.lhs.true7, label %lor.lhs.false.i 91 92lor.lhs.false.i: 93 br i1 undef, label %if.then10.i, label %land.lhs.true7 94 95if.then10.i: 96 %xFlags.1.i = select i1 undef, i32 0, i32 undef 97 br i1 undef, label %land.lhs.true33.i, label %f.exit 98 99land.lhs.true33.i: 100 %and26.i = and i32 %xFlags.1.i, 8 101 %cmp27.i = icmp eq i32 %and26.i, 0 102 %and29.i = and i32 %xFlags.1.i, 2147483645 103 %xFlags.1.and29.i = select i1 %cmp27.i, i32 %xFlags.1.i, i32 %and29.i 104 %and34.i = and i32 %xFlags.1.i, 8 105 %cmp35.i = icmp eq i32 %and34.i, 0 106 %and37.i = and i32 %xFlags.1.i, 2147483645 107 %yFlags.1.and37.i = select i1 %cmp35.i, i32 %xFlags.1.i, i32 %and37.i 108 br label %f.exit 109 110f.exit: 111 %xFlags.3.i = phi i32 [ %xFlags.1.and29.i, %land.lhs.true33.i ], [ %xFlags.1.i, %if.then10.i ] 112 %yFlags.2.i = phi i32 [ %yFlags.1.and37.i, %land.lhs.true33.i ], [ %xFlags.1.i, %if.then10.i ] 113 %cmp40.i = icmp eq i32 %xFlags.3.i, %yFlags.2.i 114 br i1 %cmp40.i, label %land.lhs.true7, label %land.end 115 116land.lhs.true7: 117 br i1 undef, label %land.lhs.true34, label %lor.lhs.false27 118 119lor.lhs.false27: 120 br i1 undef, label %land.lhs.true34, label %land.end 121 122land.lhs.true34: 123 br i1 undef, label %land.end, label %lor.lhs.false44 124 125lor.lhs.false44: 126 ret void 127 128land.end: 129 ret void 130} 131