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Diffstat (limited to 'test/Analysis/ScalarEvolution/avoid-smax-0.ll')
| -rw-r--r-- | test/Analysis/ScalarEvolution/avoid-smax-0.ll | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/avoid-smax-0.ll b/test/Analysis/ScalarEvolution/avoid-smax-0.ll new file mode 100644 index 0000000000..a8c5aba73d --- /dev/null +++ b/test/Analysis/ScalarEvolution/avoid-smax-0.ll @@ -0,0 +1,35 @@ +; RUN: llvm-as < %s | opt -scalar-evolution -analyze | grep {Loop bb3: (-1 + %n) iterations!} + +; We don't want to use a max in the trip count expression in +; this testcase. + +define void @foo(i32 %n, i32* %p, i32* %q) nounwind { +entry: + icmp sgt i32 %n, 0 + br i1 %0, label %bb, label %return + +bb: + load i32* %q, align 4 + icmp eq i32 %1, 0 + br i1 %2, label %return, label %bb3.preheader + +bb3.preheader: + br label %bb3 + +bb3: + %i.0 = phi i32 [ %7, %bb3 ], [ 0, %bb3.preheader ] + getelementptr i32* %p, i32 %i.0 + load i32* %3, align 4 + add i32 %4, 1 + getelementptr i32* %p, i32 %i.0 + store i32 %5, i32* %6, align 4 + add i32 %i.0, 1 + icmp slt i32 %7, %n + br i1 %8, label %bb3, label %return.loopexit + +return.loopexit: + br label %return + +return: + ret void +} |