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[mips] [IAS] Do not generate redundant ORi in createLShiftOri.

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Summary: If the immediate is 0, the ORi is pointless.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8969

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235990 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Toma Tabacu 2015-04-28 14:06:35 +00:00
parent 1f7a90d793
commit 8bec0f9db1
3 changed files with 20 additions and 13 deletions
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4
lib/Target/Mips/AsmParser/MipsAsmParser.cpp
View File

@ -1645,6 +1645,10 @@ void createLShiftOri(MCOperand Operand, unsigned RegNo, SMLoc IDLoc,
Instructions.push_back(tmpInst);
tmpInst.clear();
}
// There's no need for an ORi if the immediate is 0.
if (Operand.isImm() && Operand.getImm() == 0)
return;
tmpInst.setOpcode(Mips::ORi);
tmpInst.addOperand(MCOperand::CreateReg(RegNo));
tmpInst.addOperand(MCOperand::CreateReg(RegNo));

13
test/MC/Mips/mips-expansions.s
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@ -4,11 +4,13 @@
#------------------------------------------------------------------------------
# Load immediate instructions
#------------------------------------------------------------------------------
# CHECK: ori $5, $zero, 123 # encoding: [0x7b,0x00,0x05,0x34]
# CHECK: addiu $6, $zero, -2345 # encoding: [0xd7,0xf6,0x06,0x24]
# CHECK: lui $7, 1 # encoding: [0x01,0x00,0x07,0x3c]
# CHECK: ori $7, $7, 2 # encoding: [0x02,0x00,0xe7,0x34]
# CHECK: addiu $8, $zero, -8 # encoding: [0xf8,0xff,0x08,0x24]
# CHECK: ori $5, $zero, 123 # encoding: [0x7b,0x00,0x05,0x34]
# CHECK: addiu $6, $zero, -2345 # encoding: [0xd7,0xf6,0x06,0x24]
# CHECK: lui $7, 1 # encoding: [0x01,0x00,0x07,0x3c]
# CHECK: ori $7, $7, 2 # encoding: [0x02,0x00,0xe7,0x34]
# CHECK: addiu $8, $zero, -8 # encoding: [0xf8,0xff,0x08,0x24]
# CHECK: lui $9, 1 # encoding: [0x01,0x00,0x09,0x3c]
# CHECK-NOT: ori $9, $9, 0 # encoding: [0x00,0x00,0x29,0x35]
# CHECK: addiu $4, $zero, 20 # encoding: [0x14,0x00,0x04,0x24]
# CHECK: lui $7, 1 # encoding: [0x01,0x00,0x07,0x3c]
@ -70,6 +72,7 @@
li $6,-2345
li $7,65538
li $8, ~7
li $9, 0x10000
la $a0, 20
la $7,65538

16
test/MC/Mips/mips64-expansions.s
View File

@ -52,25 +52,25 @@
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 28609 # encoding: [0xc1,0x6f,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: lui $12, 355 # encoding: [0x63,0x01,0x0c,0x3c]
# CHECK: ori $12, $12, 17784 # encoding: [0x78,0x45,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 23946 # encoding: [0x8a,0x5d,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: lui $12, 3552 # encoding: [0xe0,0x0d,0x0c,0x3c]
# CHECK: ori $12, $12, 46771 # encoding: [0xb3,0xb6,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 42852 # encoding: [0x64,0xa7,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: lui $12, 35527 # encoding: [0xc7,0x8a,0x0c,0x3c]
# CHECK: ori $12, $12, 8964 # encoding: [0x04,0x23,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 35304 # encoding: [0xe8,0x89,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: addiu $12, $zero, -1 # encoding: [0xff,0xff,0x0c,0x24]
# CHECK: addiu $12, $zero, -10 # encoding: [0xf6,0xff,0x0c,0x24]
# CHECK: addiu $12, $zero, -100 # encoding: [0x9c,0xff,0x0c,0x24]
@ -147,25 +147,25 @@
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 36927 # encoding: [0x3f,0x90,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: lui $12, 65180 # encoding: [0x9c,0xfe,0x0c,0x3c]
# CHECK: ori $12, $12, 47751 # encoding: [0x87,0xba,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 41590 # encoding: [0x76,0xa2,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: lui $12, 61983 # encoding: [0x1f,0xf2,0x0c,0x3c]
# CHECK: ori $12, $12, 18764 # encoding: [0x4c,0x49,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 22684 # encoding: [0x9c,0x58,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK: lui $12, 30008 # encoding: [0x38,0x75,0x0c,0x3c]
# CHECK: ori $12, $12, 56571 # encoding: [0xfb,0xdc,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 30232 # encoding: [0x18,0x76,0x8c,0x35]
# CHECK: dsll $12, $12, 16 # encoding: [0x38,0x64,0x0c,0x00]
# CHECK: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
# CHECK-NOT: ori $12, $12, 0 # encoding: [0x00,0x00,0x8c,0x35]
dli $t0, 1
dli $t0, 10