[llvm-commits] [llvm] r145851 - in /llvm/trunk: lib/Target/ARM/AsmParser/ARMAsmParser.cpp test/MC/ARM/basic-thumb2-instructions.s
Jim Grosbach
grosbach at apple.com
Mon Dec 5 13:06:26 PST 2011
Author: grosbach
Date: Mon Dec 5 15:06:26 2011
New Revision: 145851
URL: http://llvm.org/viewvc/llvm-project?rev=145851&view=rev
Log:
Thumb2 prefer encoding T3 to T4 for ADD/SUB immediate instructions.
rdar://10529348
Modified:
llvm/trunk/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s
Modified: llvm/trunk/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/AsmParser/ARMAsmParser.cpp?rev=145851&r1=145850&r2=145851&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/AsmParser/ARMAsmParser.cpp (original)
+++ llvm/trunk/lib/Target/ARM/AsmParser/ARMAsmParser.cpp Mon Dec 5 15:06:26 2011
@@ -5200,6 +5200,24 @@
Inst = TmpInst;
}
break;
+ case ARM::t2ADDri12:
+ // If the immediate fits for encoding T3 (t2ADDri) and the generic "add"
+ // mnemonic was used (not "addw"), encoding T3 is preferred.
+ if (static_cast<ARMOperand*>(Operands[0])->getToken() != "add" ||
+ ARM_AM::getT2SOImmVal(Inst.getOperand(2).getImm()) == -1)
+ break;
+ Inst.setOpcode(ARM::t2ADDri);
+ Inst.addOperand(MCOperand::CreateReg(0)); // cc_out
+ break;
+ case ARM::t2SUBri12:
+ // If the immediate fits for encoding T3 (t2SUBri) and the generic "sub"
+ // mnemonic was used (not "subw"), encoding T3 is preferred.
+ if (static_cast<ARMOperand*>(Operands[0])->getToken() != "sub" ||
+ ARM_AM::getT2SOImmVal(Inst.getOperand(2).getImm()) == -1)
+ break;
+ Inst.setOpcode(ARM::t2SUBri);
+ Inst.addOperand(MCOperand::CreateReg(0)); // cc_out
+ break;
case ARM::tADDi8:
// If the immediate is in the range 0-7, we want tADDi3 iff Rd was
// explicitly specified. From the ARM ARM: "Encoding T1 is preferred
Modified: llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s?rev=145851&r1=145850&r2=145851&view=diff
==============================================================================
--- llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s (original)
+++ llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s Mon Dec 5 15:06:26 2011
@@ -74,6 +74,7 @@
addw r12, r6, #0x100
adds r1, r2, #0x1f0
add r2, #1
+ add r0, r0, #32
@ CHECK: itet eq @ encoding: [0x0a,0xbf]
@ CHECK: addeq r1, r2, #4 @ encoding: [0x11,0x1d]
@@ -87,6 +88,7 @@
@ CHECK: addw r12, r6, #256 @ encoding: [0x06,0xf2,0x00,0x1c]
@ CHECK: adds.w r1, r2, #496 @ encoding: [0x12,0xf5,0xf8,0x71]
@ CHECK: add.w r2, r2, #1 @ encoding: [0x02,0xf1,0x01,0x02]
+@ CHECK: add.w r0, r0, #32 @ encoding: [0x00,0xf1,0x20,0x00]
@------------------------------------------------------------------------------
@@ -2566,6 +2568,7 @@
subw r12, r6, #0x100
subs r1, r2, #0x1f0
sub r2, #1
+ sub r0, r0, #32
@ CHECK: itet eq @ encoding: [0x0a,0xbf]
@ CHECK: subeq r1, r2, #4 @ encoding: [0x11,0x1f]
@@ -2579,6 +2582,7 @@
@ CHECK: subw r12, r6, #256 @ encoding: [0xa6,0xf2,0x00,0x1c]
@ CHECK: subs.w r1, r2, #496 @ encoding: [0xb2,0xf5,0xf8,0x71]
@ CHECK: sub.w r2, r2, #1 @ encoding: [0xa2,0xf1,0x01,0x02]
+@ CHECK: sub.w r0, r0, #32 @ encoding: [0xa0,0xf1,0x20,0x00]
@------------------------------------------------------------------------------
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