; RUN: llc < %s -regalloc=greedy -mcpu=cortex-a8 -relocation-model=pic -disable-fp-elim -verify-machineinstrs | FileCheck %s
;
; ARM tests that crash or fail with the greedy register allocator.
target triple = "thumbv7-apple-darwin"
declare double @exp(double)
; CHECK: remat_subreg
define 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 {
entry:
%conv16 = fpext float %lambda to double
%mul17 = fmul double %conv16, -1.000000e+00
br i1 undef, label %cond.end.us, label %cond.end
cond.end.us: ; preds = %entry
unreachable
cond.end: ; preds = %cond.end, %entry
%mul = fmul double undef, 0.000000e+00
%add = fadd double undef, %mul
%add46 = fadd double undef, undef
%add75 = fadd double 0.000000e+00, undef
br i1 undef, label %for.end, label %cond.end
for.end: ; preds = %cond.end
%conv78 = sitofp i32 %z to double
%conv83 = fpext float %c to double
%mul84 = fmul double %mul17, %conv83
%call85 = tail call double @exp(double %mul84) nounwind
%mul86 = fmul double %conv78, %call85
%add88 = fadd double 0.000000e+00, %mul86
; CHECK: blx _exp
%call100 = tail call double @exp(double %mul84) nounwind
%mul101 = fmul double undef, %call100
%add103 = fadd double %add46, %mul101
%mul111 = fmul double undef, %conv83
%mul119 = fmul double %mul111, undef
%add121 = fadd double undef, %mul119
%div = fdiv double 1.000000e+00, %conv16
%div126 = fdiv double %add, %add75
%sub = fsub double %div, %div126
%div129 = fdiv double %add103, %add88
%add130 = fadd double %sub, %div129
%conv131 = fptrunc double %add130 to float
store float %conv131, float* %ret_f, align 4
%mul139 = fmul double %div129, %div129
%div142 = fdiv double %add121, %add88
%sub143 = fsub double %mul139, %div142
; %lambda is passed on the stack, and the stack slot load is rematerialized.
; The rematted load of a float constrains the D register used for the mul.
; CHECK: vldr
%mul146 = fmul float %lambda, %lambda
%conv147 = fpext float %mul146 to double
%div148 = fdiv double 1.000000e+00, %conv147
%sub149 = fsub double %sub143, %div148
%conv150 = fptrunc double %sub149 to float
store float %conv150, float* %ret_df, align 4
ret void
}
; CHECK: insert_elem
; This test has a sub-register copy with a kill flag:
; %vreg6:ssub_3<def> = COPY %vreg6:ssub_2<kill>; QPR_VFP2:%vreg6
; The rewriter must do something sensible with that, or the scavenger crashes.
define void @insert_elem() nounwind {
entry:
br i1 undef, label %if.end251, label %if.then84
if.then84: ; preds = %entry
br i1 undef, label %if.end251, label %if.then195
if.then195: ; preds = %if.then84
%div = fdiv float 1.000000e+00, undef
%vecinit207 = insertelement <4 x float> undef, float %div, i32 1
%vecinit208 = insertelement <4 x float> %vecinit207, float 1.000000e+00, i32 2
%vecinit209 = insertelement <4 x float> %vecinit208, float 1.000000e+00, i32 3
%mul216 = fmul <4 x float> zeroinitializer, %vecinit209
store <4 x float> %mul216, <4 x float>* undef, align 16
br label %if.end251
if.end251: ; preds = %if.then195, %if.then84, %entry
ret void
}
; Coalescer failure: removeCopyByCommutingDef leaves a bad kill flag
; behind.
define void @rdar11950722() nounwind readonly optsize ssp align 2 {
entry:
br i1 undef, label %land.lhs.true7, label %lor.lhs.false.i
lor.lhs.false.i:
br i1 undef, label %if.then10.i, label %land.lhs.true7
if.then10.i:
%xFlags.1.i = select i1 undef, i32 0, i32 undef
br i1 undef, label %land.lhs.true33.i, label %f.exit
land.lhs.true33.i:
%and26.i = and i32 %xFlags.1.i, 8
%cmp27.i = icmp eq i32 %and26.i, 0
%and29.i = and i32 %xFlags.1.i, 2147483645
%xFlags.1.and29.i = select i1 %cmp27.i, i32 %xFlags.1.i, i32 %and29.i
%and34.i = and i32 %xFlags.1.i, 8
%cmp35.i = icmp eq i32 %and34.i, 0
%and37.i = and i32 %xFlags.1.i, 2147483645
%yFlags.1.and37.i = select i1 %cmp35.i, i32 %xFlags.1.i, i32 %and37.i
br label %f.exit
f.exit:
%xFlags.3.i = phi i32 [ %xFlags.1.and29.i, %land.lhs.true33.i ], [ %xFlags.1.i, %if.then10.i ]
%yFlags.2.i = phi i32 [ %yFlags.1.and37.i, %land.lhs.true33.i ], [ %xFlags.1.i, %if.then10.i ]
%cmp40.i = icmp eq i32 %xFlags.3.i, %yFlags.2.i
br i1 %cmp40.i, label %land.lhs.true7, label %land.end
land.lhs.true7:
br i1 undef, label %land.lhs.true34, label %lor.lhs.false27
lor.lhs.false27:
br i1 undef, label %land.lhs.true34, label %land.end
land.lhs.true34:
br i1 undef, label %land.end, label %lor.lhs.false44
lor.lhs.false44:
ret void
land.end:
ret void
}