| ; RUN: llc < %s -mcpu=atom -mtriple=i686-linux | FileCheck %s |
| ; CHECK: addl |
| ; CHECK-NEXT:leal |
| ; CHECK-NEXT:decl |
| ; CHECK-NEXT:jne |
| |
| ; Test for the FixupLEAs pre-emit pass. An LEA should be substituted for the ADD |
| ; that increments the array pointer because it is within 5 instructions of the |
| ; corresponding load. The ADD precedes the load by following the loop back edge. |
| |
| ; Original C code |
| ;int test(int n, int * array) |
| ;{ |
| ; int sum = 0; |
| ; for(int i = 0; i < n; i++) |
| ; sum += array[i]; |
| ; return sum; |
| ;} |
| |
| define i32 @test(i32 %n, i32* nocapture %array) { |
| entry: |
| %cmp4 = icmp sgt i32 %n, 0 |
| br i1 %cmp4, label %for.body, label %for.end |
| |
| for.body: |
| %i.06 = phi i32 [ %inc, %for.body ], [ 0, %entry ] |
| %sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ] |
| %arrayidx = getelementptr inbounds i32, i32* %array, i32 %i.06 |
| %0 = load i32, i32* %arrayidx, align 4 |
| %add = add nsw i32 %0, %sum.05 |
| %inc = add nsw i32 %i.06, 1 |
| %exitcond = icmp eq i32 %inc, %n |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: |
| %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ] |
| ret i32 %sum.0.lcssa |
| } |