101 lines
4.1 KiB
LLVM
101 lines
4.1 KiB
LLVM
; RUN: opt -S -structurizecfg %s -o - | FileCheck %s
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; The structurize cfg pass used to do a post-order traversal to generate a list
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; of ; basic blocks and then operate on the list in reverse. This led to bugs,
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; because sometimes successors would be visited before their predecessors.
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; The fix for this was to do a reverse post-order traversal which is what the
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; algorithm requires.
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; Function Attrs: nounwind
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define void @test(float* nocapture %out, i32 %K1, float* nocapture readonly %nr) {
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; CHECK: entry:
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; CHECK: br label %for.body
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entry:
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br label %for.body
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; CHECK: for.body:
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; CHECK: br i1 %{{[0-9]+}}, label %lor.lhs.false, label %Flow
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for.body: ; preds = %for.body.backedge, %entry
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%indvars.iv = phi i64 [ %indvars.iv.be, %for.body.backedge ], [ 1, %entry ]
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%best_val.027 = phi float [ %best_val.027.be, %for.body.backedge ], [ 5.000000e+01, %entry ]
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%prev_start.026 = phi i32 [ %tmp26, %for.body.backedge ], [ 0, %entry ]
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%best_count.025 = phi i32 [ %best_count.025.be, %for.body.backedge ], [ 0, %entry ]
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%tmp0 = trunc i64 %indvars.iv to i32
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%cmp1 = icmp eq i32 %tmp0, %K1
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br i1 %cmp1, label %if.then, label %lor.lhs.false
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; CHECK: lor.lhs.false:
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; CHECK: br label %Flow
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lor.lhs.false: ; preds = %for.body
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%arrayidx = getelementptr inbounds float, float* %nr, i64 %indvars.iv
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%tmp1 = load float, float* %arrayidx, align 4
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%tmp2 = add nsw i64 %indvars.iv, -1
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%arrayidx2 = getelementptr inbounds float, float* %nr, i64 %tmp2
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%tmp3 = load float, float* %arrayidx2, align 4
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%cmp3 = fcmp une float %tmp1, %tmp3
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br i1 %cmp3, label %if.then, label %for.body.1
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; CHECK: Flow:
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; CHECK: br i1 %{{[0-9]+}}, label %if.then, label %Flow1
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; CHECK: if.then:
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; CHECK: br label %Flow1
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if.then: ; preds = %lor.lhs.false, %for.body
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%sub4 = sub nsw i32 %tmp0, %prev_start.026
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%tmp4 = add nsw i64 %indvars.iv, -1
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%arrayidx8 = getelementptr inbounds float, float* %nr, i64 %tmp4
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%tmp5 = load float, float* %arrayidx8, align 4
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br i1 %cmp1, label %for.end, label %for.body.1
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; CHECK: for.end:
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; CHECK: ret void
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for.end: ; preds = %for.body.1, %if.then
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%best_val.0.lcssa = phi float [ %best_val.233, %for.body.1 ], [ %tmp5, %if.then ]
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store float %best_val.0.lcssa, float* %out, align 4
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ret void
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; CHECK: Flow1
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; CHECK: br i1 %{{[0-9]}}, label %for.body.1, label %Flow2
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; CHECK: for.body.1:
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; CHECK: br i1 %{{[0-9]+}}, label %for.body.6, label %Flow3
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for.body.1: ; preds = %if.then, %lor.lhs.false
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%best_val.233 = phi float [ %tmp5, %if.then ], [ %best_val.027, %lor.lhs.false ]
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%best_count.231 = phi i32 [ %sub4, %if.then ], [ %best_count.025, %lor.lhs.false ]
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%indvars.iv.next.454 = add nsw i64 %indvars.iv, 5
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%tmp22 = trunc i64 %indvars.iv.next.454 to i32
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%cmp1.5 = icmp eq i32 %tmp22, %K1
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br i1 %cmp1.5, label %for.end, label %for.body.6
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; CHECK: Flow2:
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; CHECK: br i1 %{{[0-9]+}}, label %for.end, label %for.body
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; CHECK: for.body.6:
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; CHECK: br i1 %cmp5.6, label %if.then6.6, label %for.body.backedge
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for.body.6: ; preds = %for.body.1
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%indvars.iv.next.559 = add nsw i64 %indvars.iv, 6
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%tmp26 = trunc i64 %indvars.iv.next.559 to i32
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%sub4.6 = sub nsw i32 %tmp26, %tmp22
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%cmp5.6 = icmp slt i32 %best_count.231, %sub4.6
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br i1 %cmp5.6, label %if.then6.6, label %for.body.backedge
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; CHECK: if.then6.6
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; CHECK: br label %for.body.backedge
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if.then6.6: ; preds = %for.body.6
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%arrayidx8.6 = getelementptr inbounds float, float* %nr, i64 %indvars.iv.next.454
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%tmp29 = load float, float* %arrayidx8.6, align 4
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br label %for.body.backedge
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; CHECK: Flow3:
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; CHECK: br label %Flow2
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; CHECK: for.body.backedge:
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; CHECK: br label %Flow3
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for.body.backedge: ; preds = %if.then6.6, %for.body.6
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%best_val.027.be = phi float [ %tmp29, %if.then6.6 ], [ %best_val.233, %for.body.6 ]
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%best_count.025.be = phi i32 [ %sub4.6, %if.then6.6 ], [ %best_count.231, %for.body.6 ]
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%indvars.iv.be = add nsw i64 %indvars.iv, 7
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br label %for.body
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}
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