diff options
Diffstat (limited to 'llvm/test/Transforms/LoopUnswitch/unswitch-select.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopUnswitch/unswitch-select.ll | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnswitch/unswitch-select.ll b/llvm/test/Transforms/LoopUnswitch/unswitch-select.ll new file mode 100644 index 00000000000..7b62587f53f --- /dev/null +++ b/llvm/test/Transforms/LoopUnswitch/unswitch-select.ll @@ -0,0 +1,27 @@ +; REQUIRES: asserts +; RUN: opt < %s -loop-unswitch -disable-output -stats 2>&1| FileCheck %s +; RUN: opt < %s -loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -disable-output -stats 2>&1| FileCheck %s + +; Check the select statement in the loop will be unswitched. +; CHECK: 1 loop-unswitch - Number of selects unswitched +define i32 @test(i1 zeroext %x, i32 %a) local_unnamed_addr #0 { +entry: + br label %while.cond + +while.cond: ; preds = %while.body, %entry + %i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ] + %s.0 = phi i32 [ %a, %entry ], [ %add, %while.body ] + %cmp = icmp slt i32 %i.0, 10000 + br i1 %cmp, label %while.body, label %while.end + +while.body: ; preds = %while.cond + %cond = select i1 %x, i32 %a, i32 %i.0 + %add = add nsw i32 %s.0, %cond + %inc = add nsw i32 %i.0, 1 + br label %while.cond + +while.end: ; preds = %while.cond + %s.0.lcssa = phi i32 [ %s.0, %while.cond ] + ret i32 %s.0.lcssa +} + |
