1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
; RUN: opt < %s -slsr -gvn -dce -S | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; Do not perform SLSR on &input[s] and &input[s * 2] which fit into addressing
; modes of X86.
define i32 @slsr_gep(i32* %input, i64 %s) {
; CHECK-LABEL: @slsr_gep(
; v0 = input[0];
%p0 = getelementptr inbounds i32, i32* %input, i64 0
%v0 = load i32, i32* %p0
; v1 = input[s];
%p1 = getelementptr inbounds i32, i32* %input, i64 %s
; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %s
%v1 = load i32, i32* %p1
; v2 = input[s * 2];
%s2 = mul nsw i64 %s, 2
%p2 = getelementptr inbounds i32, i32* %input, i64 %s2
; CHECK: %p2 = getelementptr inbounds i32, i32* %input, i64 %s2
%v2 = load i32, i32* %p2
; return v0 + v1 + v2;
%1 = add i32 %v0, %v1
%2 = add i32 %1, %v2
ret i32 %2
}
|
