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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
define void @merge_store(i32* nocapture %a) {
; CHECK-LABEL: merge_store:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: movabsq $4294967297, %rcx # imm = 0x100000001
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: .LBB0_1: # %for.body
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: movq %rcx, (%rdi,%rax,4)
; CHECK-NEXT: movq %rcx, 8(%rdi,%rax,4)
; CHECK-NEXT: addq $4, %rax
; CHECK-NEXT: cmpl $1000, %eax # imm = 0x3E8
; CHECK-NEXT: jl .LBB0_1
; CHECK-NEXT: # %bb.2: # %for.end
; CHECK-NEXT: retq
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
store i32 1, i32* %arrayidx, align 4
%0 = or i64 %indvars.iv, 1
%arrayidx2 = getelementptr inbounds i32, i32* %a, i64 %0
store i32 1, i32* %arrayidx2, align 4
%1 = or i64 %indvars.iv, 2
%arrayidx5 = getelementptr inbounds i32, i32* %a, i64 %1
store i32 1, i32* %arrayidx5, align 4
%2 = or i64 %indvars.iv, 3
%arrayidx8 = getelementptr inbounds i32, i32* %a, i64 %2
store i32 1, i32* %arrayidx8, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 4
%3 = trunc i64 %indvars.iv.next to i32
%cmp = icmp slt i32 %3, 1000
br i1 %cmp, label %for.body, label %for.end
for.end:
ret void
}
define void @indexed_store_merge(i64 %p, i8* %v) {
; CHECK-LABEL: indexed_store_merge:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movl $0, 2(%rdi,%rsi)
; CHECK-NEXT: movb $0, (%rsi)
; CHECK-NEXT: retq
entry:
%p2 = add nsw i64 %p, 2
%v2 = getelementptr i8, i8* %v, i64 %p2
store i8 0, i8* %v2, align 2
%p3 = add nsw i64 %p, 3
%v3 = getelementptr i8, i8* %v, i64 %p3
store i8 0, i8* %v3, align 1
%p4 = add nsw i64 %p, 4
%v4 = getelementptr i8, i8* %v, i64 %p4
store i8 0, i8* %v4, align 2
%p5 = add nsw i64 %p, 5
%v5 = getelementptr i8, i8* %v, i64 %p5
store i8 0, i8* %v5, align 1
%v0 = getelementptr i8, i8* %v, i64 0
store i8 0, i8* %v0, align 2
ret void
}
|