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https://github.com/RPCS3/llvm-mirror.git
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f84d001cef
Summary: After r249211, `getSCEV(X) == getSCEV(Y)` does not guarantee that X and Y are related in the dominator tree, even if X is an operand to Y (I've included a toy example in comments, and a real example as a test case). This commit changes `SimplifyIndVar` to require a `DominatorTree`. I don't think this is a problem because `ScalarEvolution` requires it anyway. Fixes PR25051. Depends on D13459. Reviewers: atrick, hfinkel Subscribers: joker.eph, llvm-commits, sanjoy Differential Revision: http://reviews.llvm.org/D13460 llvm-svn: 249471
45 lines
1.8 KiB
LLVM
45 lines
1.8 KiB
LLVM
; RUN: opt -S -indvars < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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define i32 @somefunc(double* %arr) {
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; CHECK-LABEL: @somefunc(
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entry:
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br label %for.cond.1.preheader
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for.cond.1.preheader: ; preds = %for.inc.9, %entry
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%index3.013 = phi i32 [ 0, %entry ], [ %index3.1.lcssa, %for.inc.9 ]
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%index.012 = phi i32 [ 0, %entry ], [ %inc10, %for.inc.9 ]
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%cmp2.9 = icmp sgt i32 %index.012, 0
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br i1 %cmp2.9, label %for.body.3.lr.ph, label %for.inc.9
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for.body.3.lr.ph: ; preds = %for.cond.1.preheader
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%idxprom5 = sext i32 %index.012 to i64
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br label %for.body.3
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for.body.3: ; preds = %for.body.3, %for.body.3.lr.ph
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%index3.111 = phi i32 [ %index3.013, %for.body.3.lr.ph ], [ %inc, %for.body.3 ]
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%index2.010 = phi i32 [ 0, %for.body.3.lr.ph ], [ %inc8, %for.body.3 ]
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%inc = add nsw i32 %index3.111, 1
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%idxprom = sext i32 %index3.111 to i64
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%arrayidx = getelementptr inbounds double, double* %arr, i64 %idxprom
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%idxprom4 = sext i32 %index2.010 to i64
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%inc8 = add nsw i32 %index2.010, 1
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%cmp2 = icmp slt i32 %inc8, %index.012
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br i1 %cmp2, label %for.body.3, label %for.inc.9.loopexit
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for.inc.9.loopexit: ; preds = %for.body.3
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%inc.lcssa = phi i32 [ %inc, %for.body.3 ]
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br label %for.inc.9
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for.inc.9: ; preds = %for.inc.9.loopexit, %for.cond.1.preheader
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%index3.1.lcssa = phi i32 [ %index3.013, %for.cond.1.preheader ], [ %inc.lcssa, %for.inc.9.loopexit ]
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%inc10 = add nsw i32 %index.012, 1
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%cmp = icmp slt i32 %inc10, 10
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br i1 %cmp, label %for.cond.1.preheader, label %for.end.11
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for.end.11: ; preds = %for.inc.9
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ret i32 1
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}
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