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| author | Torok Edwin <edwintorok@gmail.com> | 2009-05-24 14:23:16 +0000 |
|---|---|---|
| committer | Torok Edwin <edwintorok@gmail.com> | 2009-05-24 14:23:16 +0000 |
| commit | b679de2a21f5ecbae81b444290d72af93aa5b0b3 (patch) | |
| tree | 8a582e9fdfcd6bc1efa5b91248c86aafe4c22f00 /test/Transforms/IndVarSimplify | |
| parent | ed2f8c557a86612ee14fea25e7be2d3c1445951a (diff) | |
| download | llvm-b679de2a21f5ecbae81b444290d72af93aa5b0b3.tar.gz llvm-b679de2a21f5ecbae81b444290d72af93aa5b0b3.tar.bz2 llvm-b679de2a21f5ecbae81b444290d72af93aa5b0b3.tar.xz | |
The rewriter may hold references to instructions that are deleted because they are trivially dead.
Fix by clearing the rewriter cache before deleting the trivially dead
instructions.
Also make InsertedExpressions use an AssertingVH to catch these
bugs easier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72364 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify')
| -rw-r--r-- | test/Transforms/IndVarSimplify/2009-05-24-useafterfree.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/2009-05-24-useafterfree.ll b/test/Transforms/IndVarSimplify/2009-05-24-useafterfree.ll new file mode 100644 index 0000000000..ecbb23192e --- /dev/null +++ b/test/Transforms/IndVarSimplify/2009-05-24-useafterfree.ll @@ -0,0 +1,41 @@ +; RUN: llvm-as < %s | opt -indvars +; PR4258 +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-f80:32:32" +target triple = "i386-linux-gnu" + +define void @0(i32*, i32*, i32, i32) nounwind { + br i1 false, label %bb.nph1.preheader, label %.outer._crit_edge + +bb.nph1.preheader: ; preds = %4 + %smax = select i1 false, i32 -1, i32 0 ; <i32> [#uses=1] + %tmp12 = sub i32 0, %smax ; <i32> [#uses=1] + br label %bb.nph1 + +bb.nph1: ; preds = %.outer, %bb.nph1.preheader + br i1 false, label %bb.nph3.preheader, label %.outer + +bb.nph3.preheader: ; preds = %bb.nph1 + br label %bb.nph3 + +bb.nph3: ; preds = %bb.nph3, %bb.nph3.preheader + %indvar7 = phi i32 [ %indvar.next8, %bb.nph3 ], [ 0, %bb.nph3.preheader ] ; <i32> [#uses=3] + %tmp9 = mul i32 %indvar7, -1 ; <i32> [#uses=1] + %tmp13 = add i32 %tmp9, %tmp12 ; <i32> [#uses=1] + %tmp14 = add i32 %tmp13, -2 ; <i32> [#uses=1] + %5 = icmp sgt i32 %tmp14, 0 ; <i1> [#uses=1] + %indvar.next8 = add i32 %indvar7, 1 ; <i32> [#uses=1] + br i1 %5, label %bb.nph3, label %.outer.loopexit + +.outer.loopexit: ; preds = %bb.nph3 + %indvar7.lcssa = phi i32 [ %indvar7, %bb.nph3 ] ; <i32> [#uses=0] + br label %.outer + +.outer: ; preds = %.outer.loopexit, %bb.nph1 + br i1 false, label %bb.nph1, label %.outer._crit_edge.loopexit + +.outer._crit_edge.loopexit: ; preds = %.outer + br label %.outer._crit_edge + +.outer._crit_edge: ; preds = %.outer._crit_edge.loopexit, %4 + ret void +} |