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https://github.com/c64scene-ar/llvm-6502.git
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a334aa7a10
blocks, and also exit blocks with multiple conditions (combined with (bitwise) ands and ors). It's often infeasible to compute an exact trip count in such cases, but a useful upper bound can often be found. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73866 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
2.2 KiB
LLVM
49 lines
2.2 KiB
LLVM
; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output > %t
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; RUN: grep sext %t | count 2
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; RUN: not grep {(sext} %t
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; ScalarEvolution should be able to compute a maximum trip count
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; value sufficient to fold away both sext casts.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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define float @t(float* %pTmp1, float* %peakWeight, float* %nrgReducePeakrate, i32 %bim) nounwind {
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entry:
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%tmp3 = load float* %peakWeight, align 4 ; <float> [#uses=2]
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%tmp2538 = icmp sgt i32 %bim, 0 ; <i1> [#uses=1]
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br i1 %tmp2538, label %bb.nph, label %bb4
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb1, %bb.nph
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%distERBhi.036 = phi float [ %tmp10, %bb1 ], [ 0.000000e+00, %bb.nph ] ; <float> [#uses=1]
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%hiPart.035 = phi i32 [ %tmp12, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2]
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%peakCount.034 = phi float [ %tmp19, %bb1 ], [ %tmp3, %bb.nph ] ; <float> [#uses=1]
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%tmp6 = sext i32 %hiPart.035 to i64 ; <i64> [#uses=1]
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%tmp7 = getelementptr float* %pTmp1, i64 %tmp6 ; <float*> [#uses=1]
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%tmp8 = load float* %tmp7, align 4 ; <float> [#uses=1]
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%tmp10 = fadd float %tmp8, %distERBhi.036 ; <float> [#uses=3]
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%tmp12 = add i32 %hiPart.035, 1 ; <i32> [#uses=3]
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%tmp15 = sext i32 %tmp12 to i64 ; <i64> [#uses=1]
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%tmp16 = getelementptr float* %peakWeight, i64 %tmp15 ; <float*> [#uses=1]
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%tmp17 = load float* %tmp16, align 4 ; <float> [#uses=1]
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%tmp19 = fadd float %tmp17, %peakCount.034 ; <float> [#uses=2]
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br label %bb1
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bb1: ; preds = %bb
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%tmp21 = fcmp olt float %tmp10, 2.500000e+00 ; <i1> [#uses=1]
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%tmp25 = icmp slt i32 %tmp12, %bim ; <i1> [#uses=1]
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%tmp27 = and i1 %tmp21, %tmp25 ; <i1> [#uses=1]
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br i1 %tmp27, label %bb, label %bb1.bb4_crit_edge
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bb1.bb4_crit_edge: ; preds = %bb1
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br label %bb4
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bb4: ; preds = %bb1.bb4_crit_edge, %entry
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%distERBhi.0.lcssa = phi float [ %tmp10, %bb1.bb4_crit_edge ], [ 0.000000e+00, %entry ] ; <float> [#uses=1]
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%peakCount.0.lcssa = phi float [ %tmp19, %bb1.bb4_crit_edge ], [ %tmp3, %entry ] ; <float> [#uses=1]
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%tmp31 = fdiv float %peakCount.0.lcssa, %distERBhi.0.lcssa ; <float> [#uses=1]
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ret float %tmp31
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}
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