1*9880d681SAndroid Build Coastguard Worker; RUN: llc < %s -mcpu=atom -mtriple=i686-linux | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; CHECK: addl 3*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT:leal 4*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT:decl 5*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT:jne 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; Test for the FixupLEAs pre-emit pass. An LEA should be substituted for the ADD 8*9880d681SAndroid Build Coastguard Worker; that increments the array pointer because it is within 5 instructions of the 9*9880d681SAndroid Build Coastguard Worker; corresponding load. The ADD precedes the load by following the loop back edge. 10*9880d681SAndroid Build Coastguard Worker 11*9880d681SAndroid Build Coastguard Worker; Original C code 12*9880d681SAndroid Build Coastguard Worker;int test(int n, int * array) 13*9880d681SAndroid Build Coastguard Worker;{ 14*9880d681SAndroid Build Coastguard Worker; int sum = 0; 15*9880d681SAndroid Build Coastguard Worker; for(int i = 0; i < n; i++) 16*9880d681SAndroid Build Coastguard Worker; sum += array[i]; 17*9880d681SAndroid Build Coastguard Worker; return sum; 18*9880d681SAndroid Build Coastguard Worker;} 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Workerdefine i32 @test(i32 %n, i32* nocapture %array) { 21*9880d681SAndroid Build Coastguard Workerentry: 22*9880d681SAndroid Build Coastguard Worker %cmp4 = icmp sgt i32 %n, 0 23*9880d681SAndroid Build Coastguard Worker br i1 %cmp4, label %for.body, label %for.end 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Workerfor.body: 26*9880d681SAndroid Build Coastguard Worker %i.06 = phi i32 [ %inc, %for.body ], [ 0, %entry ] 27*9880d681SAndroid Build Coastguard Worker %sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ] 28*9880d681SAndroid Build Coastguard Worker %arrayidx = getelementptr inbounds i32, i32* %array, i32 %i.06 29*9880d681SAndroid Build Coastguard Worker %0 = load i32, i32* %arrayidx, align 4 30*9880d681SAndroid Build Coastguard Worker %add = add nsw i32 %0, %sum.05 31*9880d681SAndroid Build Coastguard Worker %inc = add nsw i32 %i.06, 1 32*9880d681SAndroid Build Coastguard Worker %exitcond = icmp eq i32 %inc, %n 33*9880d681SAndroid Build Coastguard Worker br i1 %exitcond, label %for.end, label %for.body 34*9880d681SAndroid Build Coastguard Worker 35*9880d681SAndroid Build Coastguard Workerfor.end: 36*9880d681SAndroid Build Coastguard Worker %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] 37*9880d681SAndroid Build Coastguard Worker ret i32 %sum.0.lcssa 38*9880d681SAndroid Build Coastguard Worker} 39