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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135702 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index a877619a2e1baa5d92f2b6b344b8473b1570e9ee..fdc2533fe31bc2880f17735b6b3b45acb6b92cbb 100644 (file)
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -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)>;

diff --git a/test/MC/ARM/basic-arm-instructions.s b/test/MC/ARM/basic-arm-instructions.s
index 968e3f84c0fc093c58b022f58a437d92e5143ee2..da4ea0e9f50d05f91056ed9d7a6284e35d1a8fde 100644 (file)
--- a/test/MC/ARM/basic-arm-instructions.s
+++ b/test/MC/ARM/basic-arm-instructions.s
@@ -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*