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efb9fbfdab
These values aren't analyzable, so they don't care if more information about the loop trip count can be had. Also, SCEVUnknown is used for a PHI while the PHI itself is being analyzed, so it needs to be left in the Scalars map. This fixes a variety of subtle issues. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71533 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
LLVM
; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep {120, %bb2.bb3_crit_edge}
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64"
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target triple = "i686-pc-linux-gnu"
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; Indvars should be able to compute an exit value for %tmp1.
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define i32 @testcase(i5 zeroext %k) nounwind readnone {
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entry:
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br i1 false, label %bb3, label %bb.nph
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb2, %bb.nph
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%result2 = phi i32 [ %tmp1, %bb2 ], [ 0, %bb.nph ] ; <i32> [#uses=1]
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%k_01 = phi i5 [ %indvar_next1, %bb2 ], [ 0, %bb.nph ] ; <i5> [#uses=2]
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%tmp2 = zext i5 %k_01 to i32 ; <i32> [#uses=1]
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%tmp1 = add i32 %tmp2, %result2 ; <i32> [#uses=2]
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%indvar_next1 = add i5 %k_01, 1 ; <i5> [#uses=2]
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br label %bb2
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bb2: ; preds = %bb
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%phitmp = icmp eq i5 %indvar_next1, -16 ; <i1> [#uses=1]
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br i1 %phitmp, label %bb2.bb3_crit_edge, label %bb
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bb2.bb3_crit_edge: ; preds = %bb2
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br label %bb3
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bb3: ; preds = %bb2.bb3_crit_edge, %entry
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%result.lcssa = phi i32 [ %tmp1, %bb2.bb3_crit_edge ], [ 0, %entry ] ; <i32> [#uses=1]
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ret i32 %result.lcssa
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}
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