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ARM: diagnose deprecated syntax

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The use of SP and PC in the register list for stores is deprecated on ARM
(ARM ARM A.8.8.199):

  ARM deprecates the use of ARM instructions that include the SP or the PC in
  the list.

Provide a deprecation warning from the assembler in the case that the syntax is
ever seen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224319 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Saleem Abdulrasool 2014-12-16 05:53:25 +00:00
parent edfeeb6d70
commit fbdea180c0
3 changed files with 163 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/Target/ARM/ARMInstrInfo.td
View File

@ -3167,7 +3167,8 @@ defm LDM : arm_ldst_mult<"ldm", "", 1, 0, LdStMulFrm, IIC_iLoad_m,
let mayStore = 1, hasExtraSrcRegAllocReq = 1 in
defm STM : arm_ldst_mult<"stm", "", 0, 0, LdStMulFrm, IIC_iStore_m,
IIC_iStore_mu>;
IIC_iStore_mu>,
ComplexDeprecationPredicate<"ARMStore">;
} // hasSideEffects

14
lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
View File

@ -75,6 +75,20 @@ static bool getITDeprecationInfo(MCInst &MI, MCSubtargetInfo &STI,
return false;
}
static bool getARMStoreDeprecationInfo(MCInst &MI, MCSubtargetInfo &STI,
std::string &Info) {
assert(MI.getNumOperands() > 4 && "expected >4 arguments");
for (unsigned OI = 4, OE = MI.getNumOperands(); OI < OE; ++OI) {
assert(MI.getOperand(OI).isReg() && "expected register");
if (MI.getOperand(OI).getReg() == ARM::SP ||
MI.getOperand(OI).getReg() == ARM::PC) {
Info = "use of SP or PC in the list is deprecated";
return true;
}
}
return false;
}
#define GET_INSTRINFO_MC_DESC
#include "ARMGenInstrInfo.inc"

147
test/MC/ARM/arm-store-deprecated.s Normal file
View File

@ -0,0 +1,147 @@
@ RUN: llvm-mc -triple armv7-linux-eabi -filetype asm -o /dev/null %s 2>&1 \
@ RUN: | FileCheck %s
.syntax unified
.arm
.global stm
.type stm,%function
stm:
stm sp!, {r0, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stm sp!, {r0, pc}
@ CHECK: ^
stm r0!, {r0, sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stm r0!, {r0, sp}
@ CHECK: ^
stm r1!, {r0, sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stm r1!, {r0, sp, pc}
@ CHECK: ^
stm r2!, {sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stm r2!, {sp, pc}
@ CHECK: ^
stm sp!, {pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stm sp!, {pc}
@ CHECK: ^
stm r0!, {sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stm r0!, {sp}
@ CHECK: ^
.global stmda
.type stmda,%function
stmda:
stmda sp!, {r0, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmda sp!, {r0, pc}
@ CHECK: ^
stmda r0!, {r0, sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmda r0!, {r0, sp}
@ CHECK: ^
stmda r1!, {r0, sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmda r1!, {r0, sp, pc}
@ CHECK: ^
stmda r2!, {sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmda r2!, {sp, pc}
@ CHECK: ^
stmda sp!, {pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmda sp!, {pc}
@ CHECK: ^
stmda r0!, {sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmda r0!, {sp}
@ CHECK: ^
.global stmdb
.type stmdb,%function
stmdb:
stmdb sp!, {r0, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmdb sp!, {r0, pc}
@ CHECK: ^
stmdb r0!, {r0, sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmdb r0!, {r0, sp}
@ CHECK: ^
stmdb r1!, {r0, sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmdb r1!, {r0, sp, pc}
@ CHECK: ^
stmdb r2!, {sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmdb r2!, {sp, pc}
@ CHECK: ^
stmdb sp!, {pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmdb sp!, {pc}
@ CHECK: ^
stmdb r0!, {sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmdb r0!, {sp}
@ CHECK: ^
.global stmib
.type stmib,%function
stmib:
stmib sp!, {r0, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmib sp!, {r0, pc}
@ CHECK: ^
stmib r0!, {r0, sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmib r0!, {r0, sp}
@ CHECK: ^
stmib r1!, {r0, sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmib r1!, {r0, sp, pc}
@ CHECK: ^
stmib r2!, {sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmib r2!, {sp, pc}
@ CHECK: ^
stmib sp!, {pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmib sp!, {pc}
@ CHECK: ^
stmib r0!, {sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: stmib r0!, {sp}
@ CHECK: ^
.global push
.type push,%function
push:
push {r0, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: push {r0, pc}
@ CHECK: ^
push {r0, sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: push {r0, sp}
@ CHECK: ^
push {r0, sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: push {r0, sp, pc}
@ CHECK: ^
push {sp, pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: push {sp, pc}
@ CHECK: ^
push {pc}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: push {pc}
@ CHECK: ^
push {sp}
@ CHECK: warning: use of SP or PC in the list is deprecated
@ CHECK: push {sp}
@ CHECK: ^