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ARM assembly parsing POP/PUSH mnemonics. 

Aliases for LDM/STM. The single-register versions should encode to LDR/STR
with writeback, but we don't (yet) get that correct. Neither does Darwin's
system assembler, though, so that's not a deal-breaker of a limitation.

llvm-svn: 135702
This commit is contained in:
Jim Grosbach 2011-07-21 19:57:11 +00:00
parent 204b8717d4
commit 0a8d89242f
2 changed files with 35 additions and 0 deletions
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6
llvm/lib/Target/ARM/ARMInstrInfo.td
View File

@ -4250,3 +4250,9 @@ def : InstAlias<"pkhbt${p} $Rd, $Rn, $Rm",
(PKHBT GPR:$Rd, GPR:$Rn, GPR:$Rm, 0, pred:$p)>;
def : InstAlias<"pkhtb${p} $Rd, $Rn, $Rm",
(PKHBT GPR:$Rd, GPR:$Rn, GPR:$Rm, 0, pred:$p)>;
// PUSH/POP aliases for STM/LDM
def : InstAlias<"push${p} $regs",
(STMDB_UPD SP, pred:$p, reglist:$regs)>;
def : InstAlias<"pop${p} $regs",
(LDMIA_UPD SP, pred:$p, reglist:$regs)>;

29
llvm/test/MC/ARM/basic-arm-instructions.s
View File

@ -990,6 +990,35 @@ _func:
@ CHECK: pkhtb r2, r2, r3, asr #31 @ encoding: [0xd3,0x2f,0x82,0xe6]
@ CHECK: pkhtb r2, r2, r3, asr #15 @ encoding: [0xd3,0x27,0x82,0xe6]
@------------------------------------------------------------------------------
@ FIXME: PLD
@------------------------------------------------------------------------------
@------------------------------------------------------------------------------
@ FIXME: PLI
@------------------------------------------------------------------------------
@------------------------------------------------------------------------------
@ POP
@------------------------------------------------------------------------------
pop {r7}
pop {r7, r8, r9, r10}
@ FIXME: pop of a single register should encode as "ldr r7, [sp], #4"
@ CHECK-FIXME: pop {r7} @ encoding: [0x04,0x70,0x9d,0xe4]
@ CHECK: pop {r7, r8, r9, r10} @ encoding: [0x80,0x07,0xbd,0xe8]
@------------------------------------------------------------------------------
@ PUSH
@------------------------------------------------------------------------------
push {r7}
push {r7, r8, r9, r10}
@ FIXME: push of a single register should encode as "str r7, [sp, #-4]!"
@ CHECK-FIXME: push {r7} @ encoding: [0x04,0x70,0x2d,0xe5]
@ CHECK: push {r7, r8, r9, r10} @ encoding: [0x80,0x07,0x2d,0xe9]
@------------------------------------------------------------------------------
@ STM*