1 ; RUN: llc < %s -mcpu=atom -mtriple=i686-linux | FileCheck %s 2 ; CHECK: addl ([[reg:%[a-z]+]]) 3 ; CHECK-NEXT: addl $4, [[reg]] 4 5 ; Test for the FixupLEAs pre-emit pass. 6 ; An LEA should NOT be substituted for the ADD instruction 7 ; that increments the array pointer if it is greater than 5 instructions 8 ; away from the memory reference that uses it. 9 10 ; Original C code: clang -m32 -S -O2 11 ;int test(int n, int * array, int * m, int * array2) 12 ;{ 13 ; int i, j = 0; 14 ; int sum = 0; 15 ; for (i = 0, j = 0; i < n;) { 16 ; ++i; 17 ; *m += array2[j++]; 18 ; sum += array[i]; 19 ; } 20 ; return sum; 21 ;} 22 23 define i32 @test(i32 %n, i32* nocapture %array, i32* nocapture %m, i32* nocapture %array2) #0 { 24 entry: 25 %cmp7 = icmp sgt i32 %n, 0 26 br i1 %cmp7, label %for.body.lr.ph, label %for.end 27 28 for.body.lr.ph: ; preds = %entry 29 %.pre = load i32* %m, align 4 30 br label %for.body 31 32 for.body: ; preds = %for.body, %for.body.lr.ph 33 %0 = phi i32 [ %.pre, %for.body.lr.ph ], [ %add, %for.body ] 34 %sum.010 = phi i32 [ 0, %for.body.lr.ph ], [ %add3, %for.body ] 35 %j.09 = phi i32 [ 0, %for.body.lr.ph ], [ %inc1, %for.body ] 36 %inc1 = add nsw i32 %j.09, 1 37 %arrayidx = getelementptr inbounds i32* %array2, i32 %j.09 38 %1 = load i32* %arrayidx, align 4 39 %add = add nsw i32 %0, %1 40 store i32 %add, i32* %m, align 4 41 %arrayidx2 = getelementptr inbounds i32* %array, i32 %inc1 42 %2 = load i32* %arrayidx2, align 4 43 %add3 = add nsw i32 %2, %sum.010 44 %exitcond = icmp eq i32 %inc1, %n 45 br i1 %exitcond, label %for.end, label %for.body 46 47 for.end: ; preds = %for.body, %entry 48 %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add3, %for.body ] 49 ret i32 %sum.0.lcssa 50 } 51 52
