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| author | Andrew Trick <atrick@apple.com> | 2011-12-20 01:43:20 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2011-12-20 01:43:20 +0000 |
| commit | 1885687462c5fc6094f56d8d5f3ce0a71ae157e4 (patch) | |
| tree | dbcb715a1eecd8c2286a28757cb4eebcce199f33 | |
| parent | ba3c0bc364a31bfbcc570504aae2172914b1fe9f (diff) | |
| download | llvm-1885687462c5fc6094f56d8d5f3ce0a71ae157e4.tar.gz llvm-1885687462c5fc6094f56d8d5f3ce0a71ae157e4.tar.bz2 llvm-1885687462c5fc6094f56d8d5f3ce0a71ae157e4.tar.xz | |
Unit test for r146950: LSR postinc expansion, PR11571.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146951 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | test/Transforms/LoopStrengthReduce/2011-12-19-PostincQuadratic.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/2011-12-19-PostincQuadratic.ll b/test/Transforms/LoopStrengthReduce/2011-12-19-PostincQuadratic.ll new file mode 100644 index 0000000000..392a8bcf89 --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/2011-12-19-PostincQuadratic.ll @@ -0,0 +1,39 @@ +; RUN: opt -loop-reduce -S < %s | FileCheck %s +; +; PR11571: handle a postinc user outside of for.body7 that requires +; recursive expansion of a quadratic recurrence within for.body7. LSR +; needs to forget that for.body7 is a postinc loop during expansion. + +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-n8:16:32-S128" +target triple = "i386-unknown-freebsd10.0" + +@b = external global [121 x i32] + +; CHECK: @vb +; Outer recurrence: +; CHECK: %lsr.iv1 = phi [121 x i32]* +; Inner recurrence: +; CHECK: %lsr.iv = phi i32 +; Outer step (relative to inner recurrence): +; CHECK: %scevgep = getelementptr i1* %{{.*}}, i32 %lsr.iv +; Outer use: +; CHECK: %lsr.iv3 = phi [121 x i32]* [ %lsr.iv1, %for.body43.preheader ] +define void @vb() nounwind { +for.cond.preheader: + br label %for.body7 + +for.body7: + %indvars.iv77 = phi i32 [ %indvars.iv.next78, %for.body7 ], [ 1, %for.cond.preheader ] + %bf.072 = phi i32 [ %t1, %for.body7 ], [ 0, %for.cond.preheader ] + %t1 = add i32 %bf.072, %indvars.iv77 + %indvars.iv.next78 = add i32 %indvars.iv77, 1 + br i1 undef, label %for.body43, label %for.body7 + +for.body43: + %bf.459 = phi i32 [ %inc44, %for.body43 ], [ %t1, %for.body7 ] + %inc44 = add nsw i32 %bf.459, 1 + %arrayidx45 = getelementptr inbounds [121 x i32]* @b, i32 0, i32 %bf.459 + %t2 = load i32* %arrayidx45, align 4 + br label %for.body43 +} + |