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