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| author | Dan Gohman <gohman@apple.com> | 2009-06-24 14:31:06 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-06-24 14:31:06 +0000 |
| commit | 4815a0efee67175bb11e09966247fc80afe4870a (patch) | |
| tree | fa4c4d4b3387abafbb90850cc3f08cc49b96109f /test/Transforms | |
| parent | 85625696b9357fc4313a34de25fef95fc2c023f1 (diff) | |
| download | external_llvm-4815a0efee67175bb11e09966247fc80afe4870a.zip external_llvm-4815a0efee67175bb11e09966247fc80afe4870a.tar.gz external_llvm-4815a0efee67175bb11e09966247fc80afe4870a.tar.bz2 | |
When inserting code into a loop preheader, insert it before the
terminator, instead of after the last phi. This fixes a bug
exposed by ScalarEvolution analyzing more kinds of loops.
This fixes PR4436.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74072 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms')
| -rw-r--r-- | test/Transforms/IndVarSimplify/loop_evaluate7.ll | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/loop_evaluate7.ll b/test/Transforms/IndVarSimplify/loop_evaluate7.ll new file mode 100644 index 0000000..bce65e0 --- /dev/null +++ b/test/Transforms/IndVarSimplify/loop_evaluate7.ll @@ -0,0 +1,61 @@ +; RUN: llvm-as < %s | opt -indvars +; PR4436 + +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-pc-linux-gnu" + +define i8* @string_expandtabs() nounwind { +entry: + br i1 undef, label %bb33, label %bb1 + +bb1: ; preds = %entry + br i1 undef, label %overflow1, label %bb15 + +bb15: ; preds = %bb1 + br i1 undef, label %bb33, label %bb17 + +bb17: ; preds = %bb15 + br label %bb30 + +bb19: ; preds = %bb30 + br i1 undef, label %bb20, label %bb29 + +bb20: ; preds = %bb19 + %0 = load i32* undef, align 4 ; <i32> [#uses=1] + %1 = sub i32 %0, undef ; <i32> [#uses=1] + br label %bb23 + +bb21: ; preds = %bb23 + %2 = icmp ult i8* %q.0, undef ; <i1> [#uses=1] + br i1 %2, label %bb22, label %overflow2 + +bb22: ; preds = %bb21 + %3 = getelementptr i8* %q.0, i32 1 ; <i8*> [#uses=1] + br label %bb23 + +bb23: ; preds = %bb22, %bb20 + %i.2 = phi i32 [ %1, %bb20 ], [ %4, %bb22 ] ; <i32> [#uses=1] + %q.0 = phi i8* [ undef, %bb20 ], [ %3, %bb22 ] ; <i8*> [#uses=3] + %4 = add i32 %i.2, -1 ; <i32> [#uses=2] + %5 = icmp eq i32 %4, -1 ; <i1> [#uses=1] + br i1 %5, label %bb29, label %bb21 + +bb29: ; preds = %bb23, %bb19 + %q.1 = phi i8* [ undef, %bb19 ], [ %q.0, %bb23 ] ; <i8*> [#uses=0] + br label %bb30 + +bb30: ; preds = %bb29, %bb17 + br i1 undef, label %bb19, label %bb33 + +overflow2: ; preds = %bb21 + br i1 undef, label %bb32, label %overflow1 + +bb32: ; preds = %overflow2 + br label %overflow1 + +overflow1: ; preds = %bb32, %overflow2, %bb1 + ret i8* null + +bb33: ; preds = %bb30, %bb15, %entry + ret i8* undef +} |