blob: 24038cda50784cc7a304214d7be1225c064993af (
plain)
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
|
; RUN: llc -verify-machineinstrs -mtriple=arm64-apple-ios7.0 -disable-fp-elim -o - %s | FileCheck %s
; When generating DAG selection tables, TableGen used to only flag an
; instruction as needing a chain on its own account if it had a built-in pattern
; which used the chain. This meant that the AArch64 load/stores weren't
; recognised and so both loads from %locvar below were coalesced into a single
; LS8_LDR instruction (same operands other than the non-existent chain) and the
; increment was lost at return.
; This was obviously a Bad Thing.
declare void @bar(i8*)
define i64 @test_chains() {
; CHECK-LABEL: test_chains:
%locvar = alloca i8
call void @bar(i8* %locvar)
; CHECK: bl {{_?bar}}
%inc.1 = load i8, i8* %locvar
%inc.2 = zext i8 %inc.1 to i64
%inc.3 = add i64 %inc.2, 1
%inc.4 = trunc i64 %inc.3 to i8
store i8 %inc.4, i8* %locvar
; CHECK: ldurb {{w[0-9]+}}, [x29, [[LOCADDR:#-?[0-9]+]]]
; CHECK: add {{w[0-9]+}}, {{w[0-9]+}}, #1
; CHECK: sturb w[[STRVAL:[0-9]+]], [x29, [[LOCADDR]]]
; CHECK: and w0, w[[STRVAL]], #0xff
%ret.1 = load i8, i8* %locvar
%ret.2 = zext i8 %ret.1 to i64
ret i64 %ret.2
; CHECK: ret
}
|
