mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
453a844128
for (i=A; i<N; i++) {
if (i < X && i > Y)
do_something();
}
is transformed into
U=min(N,X); L=max(A,Y);
for (i=L;i<U;i++)
do_somethihg();
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42299 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
2.5 KiB
LLVM
58 lines
2.5 KiB
LLVM
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; Update loop iteraton space to eliminate condition inside loop.
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; RUN: llvm-as < %s | opt -loop-index-split | llvm-dis | not grep bothcond
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define void @test(float* %x, i32 %ndat, float** %y, float %xcen, i32 %xmin, i32 %xmax, float %sigmal, float %contribution) {
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entry:
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%tmp519 = icmp sgt i32 %xmin, %xmax ; <i1> [#uses=1]
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br i1 %tmp519, label %return, label %bb.preheader
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bb.preheader: ; preds = %entry
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%tmp3031 = fpext float %contribution to double ; <double> [#uses=1]
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%tmp32 = mul double %tmp3031, 5.000000e-01 ; <double> [#uses=1]
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%tmp3839 = fpext float %sigmal to double ; <double> [#uses=1]
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br label %bb
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bb: ; preds = %bb.preheader, %cond_next45
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%i.01.0 = phi i32 [ %tmp47, %cond_next45 ], [ %xmin, %bb.preheader ] ; <i32> [#uses=6]
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%tmp2 = icmp sgt i32 %i.01.0, -1 ; <i1> [#uses=1]
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%tmp6 = icmp slt i32 %i.01.0, %ndat ; <i1> [#uses=1]
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%bothcond = and i1 %tmp2, %tmp6 ; <i1> [#uses=1]
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br i1 %bothcond, label %cond_true9, label %cond_next45
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cond_true9: ; preds = %bb
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%tmp12 = getelementptr float* %x, i32 %i.01.0 ; <float*> [#uses=1]
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%tmp13 = load float* %tmp12, align 4 ; <float> [#uses=1]
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%tmp15 = sub float %xcen, %tmp13 ; <float> [#uses=1]
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%tmp16 = tail call float @fabsf( float %tmp15 ) ; <float> [#uses=1]
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%tmp18 = fdiv float %tmp16, %sigmal ; <float> [#uses=1]
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%tmp21 = load float** %y, align 4 ; <float*> [#uses=2]
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%tmp27 = getelementptr float* %tmp21, i32 %i.01.0 ; <float*> [#uses=1]
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%tmp28 = load float* %tmp27, align 4 ; <float> [#uses=1]
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%tmp2829 = fpext float %tmp28 to double ; <double> [#uses=1]
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%tmp34 = sub float -0.000000e+00, %tmp18 ; <float> [#uses=1]
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%tmp3435 = fpext float %tmp34 to double ; <double> [#uses=1]
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%tmp36 = tail call double @exp( double %tmp3435 ) ; <double> [#uses=1]
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%tmp37 = mul double %tmp32, %tmp36 ; <double> [#uses=1]
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%tmp40 = fdiv double %tmp37, %tmp3839 ; <double> [#uses=1]
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%tmp41 = add double %tmp2829, %tmp40 ; <double> [#uses=1]
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%tmp4142 = fptrunc double %tmp41 to float ; <float> [#uses=1]
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%tmp44 = getelementptr float* %tmp21, i32 %i.01.0 ; <float*> [#uses=1]
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store float %tmp4142, float* %tmp44, align 4
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br label %cond_next45
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cond_next45: ; preds = %bb, %cond_true9
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%tmp47 = add i32 %i.01.0, 1 ; <i32> [#uses=2]
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%tmp51 = icmp sgt i32 %tmp47, %xmax ; <i1> [#uses=1]
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br i1 %tmp51, label %return.loopexit, label %bb
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return.loopexit: ; preds = %cond_next45
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br label %return
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return: ; preds = %return.loopexit, %entry
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ret void
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}
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declare float @fabsf(float)
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declare double @exp(double)
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