1 ; RUN: opt < %s -licm -S | FileCheck %s 2 ; RUN: opt -passes='require<aa>,require<targetir>,require<scalar-evolution>,loop(licm)' < %s -S | FileCheck %s 3 ; PR19835 4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5 target triple = "x86_64-unknown-linux-gnu" 6 7 define i32 @f(i32 %x) { 8 entry: 9 br label %for.body 10 11 for.body: ; preds = %entry, %for.body 12 %storemerge4 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 13 %mul = mul nsw i32 %x, %x 14 %add2 = add nsw i32 %mul, %x 15 %mul3 = add nsw i32 %add2, %mul 16 %inc = add nsw i32 %storemerge4, 1 17 %cmp = icmp slt i32 %inc, 100 18 br i1 %cmp, label %for.body, label %for.end 19 20 for.end: ; preds = %for.body 21 %a9.0.lcssa = phi i32 [ %mul3, %for.body ] 22 ret i32 %a9.0.lcssa 23 } 24 25 ; Test that there is exactly one copy of mul nsw i32 %x, %x in the exit block. 26 ; CHECK: define i32 @f(i32 [[X:%.*]]) 27 ; CHECK: for.end: 28 ; CHECK-NOT: mul nsw i32 [[X]], [[X]] 29 ; CHECK: mul nsw i32 [[X]], [[X]] 30 ; CHECK-NOT: mul nsw i32 [[X]], [[X]] 31
