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
|
; RUN: llc < %s -mtriple=arm64-apple-ios | FileCheck %s
; Can't fold the increment by 1<<12 into a post-increment load
; rdar://10301335
@test_data = common global i32 0, align 4
define void @t() nounwind ssp {
; CHECK-LABEL: t:
entry:
br label %for.body
for.body:
; CHECK: for.body
; CHECK: ldr w{{[0-9]+}}, [x{{[0-9]+}}, x{{[0-9]+}}]
; CHECK: add x[[REG:[0-9]+]],
; CHECK: x[[REG]], #1, lsl #12
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%0 = shl nsw i64 %indvars.iv, 12
%add = add nsw i64 %0, 34628173824
%1 = inttoptr i64 %add to i32*
%2 = load volatile i32, i32* %1, align 4096
store volatile i32 %2, i32* @test_data, align 4
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 200
br i1 %exitcond, label %for.end, label %for.body
for.end:
ret void
}
|
