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| author | Cameron Zwarich <zwarich@apple.com> | 2011-02-22 22:25:39 +0000 |
|---|---|---|
| committer | Cameron Zwarich <zwarich@apple.com> | 2011-02-22 22:25:39 +0000 |
| commit | c4f3d51e12390f39f314451d868350e2a11a52b6 (patch) | |
| tree | cb8168bf39a610b9b09f193f4176db00228b33b2 /test/Transforms/LoopDeletion | |
| parent | 00743c2218ff3f0f4edce972e2d88893a19e6ef8 (diff) | |
| download | llvm-c4f3d51e12390f39f314451d868350e2a11a52b6.tar.gz llvm-c4f3d51e12390f39f314451d868350e2a11a52b6.tar.bz2 llvm-c4f3d51e12390f39f314451d868350e2a11a52b6.tar.xz | |
Make LoopDeletion work on loops with multiple edges, as long as the incoming
values from all of the loop's exiting blocks are equal. Patch by Andrew Clinton.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126253 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopDeletion')
| -rw-r--r-- | test/Transforms/LoopDeletion/multiple-exits.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/Transforms/LoopDeletion/multiple-exits.ll b/test/Transforms/LoopDeletion/multiple-exits.ll new file mode 100644 index 0000000000..6af413b49c --- /dev/null +++ b/test/Transforms/LoopDeletion/multiple-exits.ll @@ -0,0 +1,26 @@ +; RUN: opt < %s -loop-deletion -S | FileCheck %s + +; Checks whether dead loops with multiple exits can be eliminated + +; CHECK: entry: +; CHECK-NEXT: br label %return + +; CHECK: return: +; CHECK-NEXT: ret void + +define void @foo(i64 %n, i64 %m) nounwind { +entry: + br label %bb + +bb: + %x.0 = phi i64 [ 0, %entry ], [ %t0, %bb2 ] + %t0 = add i64 %x.0, 1 + %t1 = icmp slt i64 %x.0, %n + br i1 %t1, label %bb2, label %return +bb2: + %t2 = icmp slt i64 %x.0, %m + br i1 %t1, label %bb, label %return + +return: + ret void +} |