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
|
; RUN: opt -disable-verify -passes='default<O2>' -S < %s | FileCheck %s
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; The local array %tmp can only be optimized away by sroa after loop unroll.
; CHECK-LABEL: define void @foo
; CHECK-NOT: alloca
; CHECK-NOT: call void @llvm.memcpy.p0.p0.i64
; Function Attrs: nounwind uwtable
define void @foo(ptr %a, ptr %b) {
entry:
%a.addr = alloca ptr, align 8
%b.addr = alloca ptr, align 8
%tmp = alloca [4 x float], align 16
%i = alloca i32, align 4
store ptr %a, ptr %a.addr, align 8
store ptr %b, ptr %b.addr, align 8
store i32 0, ptr %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%iter2 = load i32, ptr %i, align 4
%cmp = icmp slt i32 %iter2, 4
br i1 %cmp, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond
br label %for.end
for.body: ; preds = %for.cond
%inptr = load ptr, ptr %a.addr, align 8
%idx2 = load i32, ptr %i, align 4
%idxprom = sext i32 %idx2 to i64
%arrayidx = getelementptr inbounds i32, ptr %inptr, i64 %idxprom
%val = load i32, ptr %arrayidx, align 4
%conv = sitofp i32 %val to float
%idx = load i32, ptr %i, align 4
%idxprom1 = sext i32 %idx to i64
%arrayidx2 = getelementptr inbounds [4 x float], ptr %tmp, i64 0, i64 %idxprom1
store float %conv, ptr %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%iter = load i32, ptr %i, align 4
%inc = add nsw i32 %iter, 1
store i32 %inc, ptr %i, align 4
br label %for.cond
for.end: ; preds = %for.cond.cleanup
%dstptr = load ptr, ptr %b.addr, align 8
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dstptr, ptr align 16 %tmp, i64 16, i1 false)
ret void
}
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
|
