1 # RUN: llc -mtriple=arm-none-eabi -run-pass=arm-cp-islands %s -o - | FileCheck %s
3 # This checks alignment of a block when a CPE is placed before/after a
4 # block (as e.g. opposed to splitting up a block), and also make sure
5 # we don't decrease alignment.
9 source_filename = "<stdin>"
10 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
11 target triple = "arm-arm--eabi"
13 declare i32 @llvm.arm.space(i32, i32) #0
15 define dso_local i32 @CP() #1 {
17 %res = alloca half, align 2
18 store half 0xH706B, half* %res, align 2
19 %0 = load half, half* %res, align 2
20 %tobool = fcmp une half %0, 0xH0000
21 br i1 %tobool, label %LA, label %END
24 %1 = call i32 @llvm.arm.space(i32 1000, i32 undef)
27 END: ; preds = %LA, %entry
28 %2 = call i32 @llvm.arm.space(i32 100, i32 undef)
32 ; Function Attrs: nounwind
33 declare void @llvm.stackprotector(i8*, i8**) #2
35 attributes #0 = { nounwind "target-features"="+v8.2a,+fullfp16" }
36 attributes #1 = { "target-features"="+v8.2a,+fullfp16" }
37 attributes #2 = { nounwind }
43 exposesReturnsTwice: false
45 regBankSelected: false
47 tracksRegLiveness: true
51 isFrameAddressTaken: false
52 isReturnAddressTaken: false
62 hasOpaqueSPAdjustment: false
64 hasMustTailInVarArgFunc: false
69 - { id: 0, name: res, type: default, offset: -2, size: 2, alignment: 2,
70 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
71 local-offset: -2, debug-info-variable: '', debug-info-expression: '',
72 debug-info-location: '' }
77 isTargetSpecific: false
80 #CHECK: bb.{{.*}} (align 2):
82 #CHECK: CONSTPOOL_ENTRY 1, %const{{.*}}, 2
84 # We don't want to decrease alignment if the block already has been
85 # aligned; this can e.g. be an existing CPE that has been carefully
86 # aligned. Here BB.1.LA has already an 8-byte alignment, and we are
87 # checking we don't set it to 4:
89 #CHECK: bb.{{.*}}.LA (align 8):
93 successors: %bb.1(0x50000000), %bb.2(0x30000000)
95 $sp = frame-setup SUBri $sp, 4, 14, $noreg, $noreg
96 frame-setup CFI_INSTRUCTION def_cfa_offset 4
97 renamable $s0 = VLDRH %const.0, 0, 14, $noreg :: (load (s16) from constant-pool)
98 VCMPZH renamable $s0, 14, $noreg, implicit-def $fpscr_nzcv
99 VSTRH killed renamable $s0, $sp, 1, 14, $noreg :: (store (s16) into %ir.res)
100 FMSTAT 14, $noreg, implicit-def $cpsr, implicit killed $fpscr_nzcv
101 Bcc %bb.2, 0, killed $cpsr
104 successors: %bb.2(0x80000000)
106 dead renamable $r0 = SPACE 1000, undef renamable $r0
109 dead renamable $r0 = SPACE 100, undef renamable $r0
110 $r0 = MOVi 42, 14, $noreg, $noreg
111 $sp = ADDri $sp, 4, 14, $noreg, $noreg
112 BX_RET 14, $noreg, implicit killed $r0