| ; RUN: opt < %s -licm -S | FileCheck %s |
| ; RUN: opt -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' < %s -S | FileCheck %s |
| ; PR19835 |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define i32 @f(i32 %x) { |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %entry, %for.body |
| %storemerge4 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %mul = mul nsw i32 %x, %x |
| %add2 = add nsw i32 %mul, %x |
| %mul3 = add nsw i32 %add2, %mul |
| %inc = add nsw i32 %storemerge4, 1 |
| %cmp = icmp slt i32 %inc, 100 |
| br i1 %cmp, label %for.body, label %for.end |
| |
| for.end: ; preds = %for.body |
| %a9.0.lcssa = phi i32 [ %mul3, %for.body ] |
| ret i32 %a9.0.lcssa |
| } |
| |
| ; Test that there is exactly one copy of mul nsw i32 %x, %x in the exit block. |
| ; CHECK: define i32 @f(i32 [[X:%.*]]) |
| ; CHECK: for.end: |
| ; CHECK-NOT: mul nsw i32 [[X]], [[X]] |
| ; CHECK: mul nsw i32 [[X]], [[X]] |
| ; CHECK-NOT: mul nsw i32 [[X]], [[X]] |