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