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| # RUN: llc -mtriple=arm-none-eabi -run-pass=arm-cp-islands %s -o - | FileCheck %s
#
# This checks alignment of a block when a CPE is placed before/after a
# block (as e.g. opposed to splitting up a block).
#
--- |
; ModuleID = '<stdin>'
source_filename = "<stdin>"
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "arm-arm--eabi"
declare i32 @llvm.arm.space(i32, i32) #0
define dso_local i32 @CP() #1 {
entry:
%res = alloca half, align 2
store half 0xH706B, half* %res, align 2
%0 = load half, half* %res, align 2
%tobool = fcmp une half %0, 0xH0000
br i1 %tobool, label %LA, label %END
LA: ; preds = %entry
%1 = call i32 @llvm.arm.space(i32 1000, i32 undef)
br label %END
END: ; preds = %LA, %entry
%2 = call i32 @llvm.arm.space(i32 100, i32 undef)
ret i32 42
}
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #2
attributes #0 = { nounwind "target-features"="+v8.2a,+fullfp16" }
attributes #1 = { "target-features"="+v8.2a,+fullfp16" }
attributes #2 = { nounwind }
...
---
name: CP
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
liveins:
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 4
offsetAdjustment: 0
maxAlignment: 2
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
savePoint: ''
restorePoint: ''
fixedStack:
stack:
- { id: 0, name: res, type: default, offset: -2, size: 2, alignment: 2,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -2, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
constants:
- id: 0
value: half 0xH706B
alignment: 2
isTargetSpecific: false
#CHECK: bb.{{.*}} (align 2):
#CHECK: successors:
#CHECK: CONSTPOOL_ENTRY 1, %const{{.*}}, 2
# We want this block to be 4 byte aligned:
#CHECK: bb.{{.*}}.LA (align 4):
body: |
bb.0.entry:
successors: %bb.1(0x50000000), %bb.2(0x30000000)
$sp = frame-setup SUBri $sp, 4, 14, $noreg, $noreg
frame-setup CFI_INSTRUCTION def_cfa_offset 4
renamable $s0 = VLDRH %const.0, 0, 14, $noreg :: (load 2 from constant-pool)
VCMPZH renamable $s0, 14, $noreg, implicit-def $fpscr_nzcv
VSTRH killed renamable $s0, $sp, 1, 14, $noreg :: (store 2 into %ir.res)
FMSTAT 14, $noreg, implicit-def $cpsr, implicit killed $fpscr_nzcv
Bcc %bb.2, 0, killed $cpsr
bb.1.LA:
successors: %bb.2(0x80000000)
dead renamable $r0 = SPACE 1000, undef renamable $r0
bb.2.END:
dead renamable $r0 = SPACE 100, undef renamable $r0
$r0 = MOVi 42, 14, $noreg, $noreg
$sp = ADDri $sp, 4, 14, $noreg, $noreg
BX_RET 14, $noreg, implicit killed $r0
...
|