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llvm-mirror/test/CodeGen/ARM/special-reg-v8m-main.ll
Javed Absar ca6d1aaf93 [ARM] Unify handling of M-Class system registers 
This patch cleans up and fixes issues in the M-Class system register handling:

1. It defines the system registers and the encoding (SYSm values) in one place:
   a new ARMSystemRegister.td using SearchableTable, thereby removing the
   hand-coded values which existed in multiple places.

2. Some system registers e.g. BASEPRI_MAX_NS which do not exist were being allowed!
   Ref: ARMv6/7/8M architecture reference manual.

Reviewed by: @t.p.northover, @olist01, @john.brawn
Differential Revision: https://reviews.llvm.org/D35209

llvm-svn: 308456
2017-07-19 12:57:16 +00:00

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7.5 KiB
LLVM
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; RUN: not llc < %s -mtriple=thumbv8m.base-none-eabi 2>&1 | FileCheck %s --check-prefix=BASELINE
; RUN: llc < %s -mtriple=thumbv8m.main-none-eabi -mattr=+dsp 2>&1 | FileCheck %s --check-prefix=MAINLINE
; BASELINE: LLVM ERROR: Invalid register name "faultmask_ns".
define i32 @read_mclass_registers() nounwind {
entry:
; MAINLINE-LABEL: read_mclass_registers:
; MAINLINE: mrs r0, apsr
; MAINLINE: mrs r1, iapsr
; MAINLINE: mrs r1, eapsr
; MAINLINE: mrs r1, xpsr
; MAINLINE: mrs r1, ipsr
; MAINLINE: mrs r1, epsr
; MAINLINE: mrs r1, iepsr
; MAINLINE: mrs r1, msp
; MAINLINE: mrs r1, psp
; MAINLINE: mrs r1, primask
; MAINLINE: mrs r1, basepri
; MAINLINE: mrs r1, basepri_max
; MAINLINE: mrs r1, faultmask
; MAINLINE: mrs r1, control
; MAINLINE: mrs r1, msplim
; MAINLINE: mrs r1, psplim
; MAINLINE: mrs r1, msp_ns
; MAINLINE: mrs r1, psp_ns
; MAINLINE: mrs r1, msplim_ns
; MAINLINE: mrs r1, psplim_ns
; MAINLINE: mrs r1, primask_ns
; MAINLINE: mrs r1, basepri_ns
; MAINLINE: mrs r1, faultmask_ns
; MAINLINE: mrs r1, control_ns
; MAINLINE: mrs r1, sp_ns
%0 = call i32 @llvm.read_register.i32(metadata !0)
%1 = call i32 @llvm.read_register.i32(metadata !4)
%add1 = add i32 %1, %0
%2 = call i32 @llvm.read_register.i32(metadata !8)
%add2 = add i32 %add1, %2
%3 = call i32 @llvm.read_register.i32(metadata !12)
%add3 = add i32 %add2, %3
%4 = call i32 @llvm.read_register.i32(metadata !16)
%add4 = add i32 %add3, %4
%5 = call i32 @llvm.read_register.i32(metadata !17)
%add5 = add i32 %add4, %5
%6 = call i32 @llvm.read_register.i32(metadata !18)
%add6 = add i32 %add5, %6
%7 = call i32 @llvm.read_register.i32(metadata !19)
%add7 = add i32 %add6, %7
%8 = call i32 @llvm.read_register.i32(metadata !20)
%add8 = add i32 %add7, %8
%9 = call i32 @llvm.read_register.i32(metadata !21)
%add9 = add i32 %add8, %9
%10 = call i32 @llvm.read_register.i32(metadata !22)
%add10 = add i32 %add9, %10
%11 = call i32 @llvm.read_register.i32(metadata !23)
%add11 = add i32 %add10, %11
%12 = call i32 @llvm.read_register.i32(metadata !24)
%add12 = add i32 %add11, %12
%13 = call i32 @llvm.read_register.i32(metadata !25)
%add13 = add i32 %add12, %13
%14 = call i32 @llvm.read_register.i32(metadata !26)
%add14 = add i32 %add13, %14
%15 = call i32 @llvm.read_register.i32(metadata !27)
%add15 = add i32 %add14, %15
%16 = call i32 @llvm.read_register.i32(metadata !28)
%add16 = add i32 %add15, %16
%17 = call i32 @llvm.read_register.i32(metadata !29)
%add17 = add i32 %add16, %17
%18 = call i32 @llvm.read_register.i32(metadata !30)
%add18 = add i32 %add17, %18
%19 = call i32 @llvm.read_register.i32(metadata !31)
%add19 = add i32 %add18, %19
%20 = call i32 @llvm.read_register.i32(metadata !32)
%add20 = add i32 %add19, %20
%21 = call i32 @llvm.read_register.i32(metadata !33)
%add21 = add i32 %add20, %21
%22 = call i32 @llvm.read_register.i32(metadata !34)
%add22 = add i32 %add21, %22
%23 = call i32 @llvm.read_register.i32(metadata !35)
%add23 = add i32 %add22, %23
%24 = call i32 @llvm.read_register.i32(metadata !36)
%add24 = add i32 %add23, %24
ret i32 %add24
}
define void @write_mclass_registers(i32 %x) nounwind {
entry:
; MAINLINE-LABEL: write_mclass_registers:
; MAINLINE: msr apsr_nzcvq, r0
; MAINLINE: msr apsr_nzcvq, r0
; MAINLINE: msr apsr_g, r0
; MAINLINE: msr apsr_nzcvqg, r0
; MAINLINE: msr iapsr_nzcvq, r0
; MAINLINE: msr iapsr_nzcvq, r0
; MAINLINE: msr iapsr_g, r0
; MAINLINE: msr iapsr_nzcvqg, r0
; MAINLINE: msr eapsr_nzcvq, r0
; MAINLINE: msr eapsr_nzcvq, r0
; MAINLINE: msr eapsr_g, r0
; MAINLINE: msr eapsr_nzcvqg, r0
; MAINLINE: msr xpsr_nzcvq, r0
; MAINLINE: msr xpsr_nzcvq, r0
; MAINLINE: msr xpsr_g, r0
; MAINLINE: msr xpsr_nzcvqg, r0
; MAINLINE: msr ipsr, r0
; MAINLINE: msr epsr, r0
; MAINLINE: msr iepsr, r0
; MAINLINE: msr msp, r0
; MAINLINE: msr psp, r0
; MAINLINE: msr primask, r0
; MAINLINE: msr basepri, r0
; MAINLINE: msr basepri_max, r0
; MAINLINE: msr faultmask, r0
; MAINLINE: msr control, r0
; MAINLINE: msr msplim, r0
; MAINLINE: msr psplim, r0
; MAINLINE: msr msp_ns, r0
; MAINLINE: msr psp_ns, r0
; MAINLINE: msr msplim_ns, r0
; MAINLINE: msr psplim_ns, r0
; MAINLINE: msr primask_ns, r0
; MAINLINE: msr basepri_ns, r0
; MAINLINE: msr faultmask_ns, r0
; MAINLINE: msr control_ns, r0
; MAINLINE: msr sp_ns, r0
call void @llvm.write_register.i32(metadata !0, i32 %x)
call void @llvm.write_register.i32(metadata !1, i32 %x)
call void @llvm.write_register.i32(metadata !2, i32 %x)
call void @llvm.write_register.i32(metadata !3, i32 %x)
call void @llvm.write_register.i32(metadata !4, i32 %x)
call void @llvm.write_register.i32(metadata !5, i32 %x)
call void @llvm.write_register.i32(metadata !6, i32 %x)
call void @llvm.write_register.i32(metadata !7, i32 %x)
call void @llvm.write_register.i32(metadata !8, i32 %x)
call void @llvm.write_register.i32(metadata !9, i32 %x)
call void @llvm.write_register.i32(metadata !10, i32 %x)
call void @llvm.write_register.i32(metadata !11, i32 %x)
call void @llvm.write_register.i32(metadata !12, i32 %x)
call void @llvm.write_register.i32(metadata !13, i32 %x)
call void @llvm.write_register.i32(metadata !14, i32 %x)
call void @llvm.write_register.i32(metadata !15, i32 %x)
call void @llvm.write_register.i32(metadata !16, i32 %x)
call void @llvm.write_register.i32(metadata !17, i32 %x)
call void @llvm.write_register.i32(metadata !18, i32 %x)
call void @llvm.write_register.i32(metadata !19, i32 %x)
call void @llvm.write_register.i32(metadata !20, i32 %x)
call void @llvm.write_register.i32(metadata !21, i32 %x)
call void @llvm.write_register.i32(metadata !22, i32 %x)
call void @llvm.write_register.i32(metadata !23, i32 %x)
call void @llvm.write_register.i32(metadata !24, i32 %x)
call void @llvm.write_register.i32(metadata !25, i32 %x)
call void @llvm.write_register.i32(metadata !26, i32 %x)
call void @llvm.write_register.i32(metadata !27, i32 %x)
call void @llvm.write_register.i32(metadata !28, i32 %x)
call void @llvm.write_register.i32(metadata !29, i32 %x)
call void @llvm.write_register.i32(metadata !30, i32 %x)
call void @llvm.write_register.i32(metadata !31, i32 %x)
call void @llvm.write_register.i32(metadata !32, i32 %x)
call void @llvm.write_register.i32(metadata !33, i32 %x)
call void @llvm.write_register.i32(metadata !34, i32 %x)
call void @llvm.write_register.i32(metadata !35, i32 %x)
call void @llvm.write_register.i32(metadata !36, i32 %x)
ret void
}
declare i32 @llvm.read_register.i32(metadata) nounwind
declare void @llvm.write_register.i32(metadata, i32) nounwind
!0 = !{!"apsr"}
!1 = !{!"apsr_nzcvq"}
!2 = !{!"apsr_g"}
!3 = !{!"apsr_nzcvqg"}
!4 = !{!"iapsr"}
!5 = !{!"iapsr_nzcvq"}
!6 = !{!"iapsr_g"}
!7 = !{!"iapsr_nzcvqg"}
!8 = !{!"eapsr"}
!9 = !{!"eapsr_nzcvq"}
!10 = !{!"eapsr_g"}
!11 = !{!"eapsr_nzcvqg"}
!12 = !{!"xpsr"}
!13 = !{!"xpsr_nzcvq"}
!14 = !{!"xpsr_g"}
!15 = !{!"xpsr_nzcvqg"}
!16 = !{!"ipsr"}
!17 = !{!"epsr"}
!18 = !{!"iepsr"}
!19 = !{!"msp"}
!20 = !{!"psp"}
!21 = !{!"primask"}
!22 = !{!"basepri"}
!23 = !{!"basepri_max"}
!24 = !{!"faultmask"}
!25 = !{!"control"}
!26 = !{!"msplim"}
!27 = !{!"psplim"}
!28 = !{!"msp_ns"}
!29 = !{!"psp_ns"}
!30 = !{!"msplim_ns"}
!31 = !{!"psplim_ns"}
!32 = !{!"primask_ns"}
!33 = !{!"basepri_ns"}
!34 = !{!"faultmask_ns"}
!35 = !{!"control_ns"}
!36 = !{!"sp_ns"}
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