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| author | dim <dim@FreeBSD.org> | 2012-08-15 19:34:23 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2012-08-15 19:34:23 +0000 |
| commit | 721c201bd55ffb73cb2ba8d39e0570fa38c44e15 (patch) | |
| tree | eacfc83d988e4b9d11114387ae7dc41243f2a363 /test/Analysis/ScalarEvolution/2012-05-29-MulAddRec.ll | |
| parent | 2b2816e083a455f7a656ae88b0fd059d1688bb36 (diff) | |
| download | FreeBSD-src-721c201bd55ffb73cb2ba8d39e0570fa38c44e15.zip FreeBSD-src-721c201bd55ffb73cb2ba8d39e0570fa38c44e15.tar.gz | |
Vendor import of llvm trunk r161861:
http://llvm.org/svn/llvm-project/llvm/trunk@161861
Diffstat (limited to 'test/Analysis/ScalarEvolution/2012-05-29-MulAddRec.ll')
| -rw-r--r-- | test/Analysis/ScalarEvolution/2012-05-29-MulAddRec.ll | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/2012-05-29-MulAddRec.ll b/test/Analysis/ScalarEvolution/2012-05-29-MulAddRec.ll new file mode 100644 index 0000000..eee4ec4 --- /dev/null +++ b/test/Analysis/ScalarEvolution/2012-05-29-MulAddRec.ll @@ -0,0 +1,45 @@ +; RUN: opt < %s -S -indvars -loop-unroll | FileCheck %s +; +; loop-unroll fully unrolls the inner loop, creating an interesting +; chain of multiplication. indvars forces SCEV to run again on the +; outer loop. While reducing the recurrence at %mul3, unsigned integer overflow +; causes one of the terms to reach zero. This forces all multiples in +; the recurrence to be zero, reducing the whole thing to a constant expression. +; +; PR12929: cast<Ty>() argument of incompatible type + +; CHECK: @func +; CHECK: for.cond: +; CHECK: %inc1 = phi i8 [ 0, %entry ], [ %0, %for.body ] +; CHECK: br label %for.body + +; CHECK: for.body: +; CHECK: %inc.9 = add i8 %inc.8, 1 +; CHECK: %0 = add i8 %inc1, 10 +; CHEKC: br label %for.cond + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +define void @func() noreturn nounwind uwtable ssp { +entry: + br label %for.cond + +for.cond.loopexit: ; preds = %for.body + %mul.lcssa = phi i8 [ %mul, %for.body ] + %0 = add i8 %inc1, 10 + %indvars.iv.next = add i8 %indvars.iv, 10 + br label %for.cond + +for.cond: ; preds = %for.cond.loopexit, %entry + %indvars.iv = phi i8 [ %indvars.iv.next, %for.cond.loopexit ], [ 10, %entry ] + %mul3 = phi i8 [ undef, %entry ], [ %mul.lcssa, %for.cond.loopexit ] + %inc1 = phi i8 [ 0, %entry ], [ %0, %for.cond.loopexit ] + br label %for.body + +for.body: ; preds = %for.body, %for.cond + %inc26 = phi i8 [ %inc1, %for.cond ], [ %inc, %for.body ] + %mul45 = phi i8 [ %mul3, %for.cond ], [ %mul, %for.body ] + %inc = add i8 %inc26, 1 + %mul = mul i8 %inc26, %mul45 + %exitcond = icmp ne i8 %inc, %indvars.iv + br i1 %exitcond, label %for.body, label %for.cond.loopexit +} |
