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# RUN: llc -run-pass=prologepilog %s -o - | FileCheck %s
# Make sure we use the correct offset for stack accesses using the base pointer
# within call frame blocks. Key points of test:
# + A large SP in ADJCALLSTACKDOWN forces each call to get its own adjustment.
# + An over-aligned stack variable means that we must use r6 rather than fp
# to access this variables.
#
# Under these circumstances, the ADJCALLSTACKDOWN must not apply to r6 offsets.
--- |
; ModuleID = 'simple.ll'
source_filename = "simple.ll"
target datalayout = "e-m:o-p:32:32-i64:64-a:0:32-n32-S128"
target triple = "thumbv7k-apple-ios"
declare void @bar([4 x i32], i32)
define void @foo(i32 %n) {
ret void
}
...
---
name: foo
liveins:
- { reg: '$r0', virtual-reg: '' }
frameInfo:
adjustsStack: true
hasCalls: true
maxCallFrameSize: 2276
stack:
- { id: 0, name: '', type: spill-slot, offset: 0, alignment: 32, size: 4 }
constants: []
body: |
bb.0 (%ir-block.0):
liveins: $r0
; CHECK: t2STRi12 killed $r0, $r6, [[OFFSET:[0-9]+]]
t2STRi12 killed $r0, %stack.0, 0, 14, $noreg :: (store (s32) into %stack.0)
ADJCALLSTACKDOWN 2276, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
; CHECK: renamable $r0 = t2LDRi12 $r6, [[OFFSET]]
renamable $r0 = t2LDRi12 %stack.0, 0, 14, $noreg, :: (load (s32) from %stack.0)
renamable $r1 = IMPLICIT_DEF
renamable $r2 = IMPLICIT_DEF
renamable $r3 = IMPLICIT_DEF
tBL 14, $noreg, @bar, csr_ios, implicit-def dead $lr, implicit $sp, implicit killed $r0, implicit killed $r1, implicit killed $r2, implicit killed $r3, implicit-def $sp
ADJCALLSTACKUP 2276, 0, 14, $noreg, implicit-def dead $sp, implicit $sp
tBX_RET 14, $noreg
...
|
