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Range checking for 16-bit immediates in ARM assembly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135071 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2011-07-13 20:10:10 +00:00
parent d1863560cb
commit fff76ee7ef
4 changed files with 25 additions and 5 deletions
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5
lib/Target/ARM/ARMInstrInfo.td
View File

@ -256,9 +256,12 @@ def lo16AllZero : PatLeaf<(i32 imm), [{
}], hi16>;
/// imm0_65535 - An immediate is in the range [0.65535].
def Imm0_65535AsmOperand: AsmOperandClass { let Name = "Imm0_65535"; }
def imm0_65535 : Operand<i32>, ImmLeaf<i32, [{
return Imm >= 0 && Imm < 65536;
}]>;
}]> {
let ParserMatchClass = Imm0_65535AsmOperand;
}
class BinOpFrag<dag res> : PatFrag<(ops node:$LHS, node:$RHS), res>;
class UnOpFrag <dag res> : PatFrag<(ops node:$Src), res>;

13
lib/Target/ARM/AsmParser/ARMAsmParser.cpp
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@ -386,6 +386,14 @@ public:
int64_t Value = CE->getValue();
return Value >= 0 && Value < 256;
}
bool isImm0_65535() const {
if (Kind != Immediate)
return false;
const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
if (!CE) return false;
int64_t Value = CE->getValue();
return Value >= 0 && Value < 65536;
}
bool isT2SOImm() const {
if (Kind != Immediate)
return false;
@ -577,6 +585,11 @@ public:
addExpr(Inst, getImm());
}
void addImm0_65535Operands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getImm());
}
void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
assert(N == 1 && "Invalid number of operands!");
addExpr(Inst, getImm());

5
test/MC/ARM/basic-arm-instructions.s
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@ -316,6 +316,5 @@ _func:
bkpt #10
bkpt #65535
@ CHECK: bkpt #10 @ encoding: [0x7a,0x00,0x20,0xe1]
@ CHECK: bkpt #65535 @ encoding: [0x7f,0xff,0x2f,0xe1]
@ CHECK: bkpt #10 @ encoding: [0x7a,0x00,0x20,0xe1]
@ CHECK: bkpt #65535 @ encoding: [0x7f,0xff,0x2f,0xe1]

7
test/MC/ARM/diagnostics.s
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@ -40,4 +40,9 @@
@ CHECK-ERRORS: ^
@ CHECK-ERRORS: error: immediate shift value out of range
@ CHECK-ERRORS: adc r4, r5, r6, ror #32
@ CHECK-ERRORS: ^
@ Out of range 16-bit immediate on BKPT
bkpt #65536
@ CHECK-ERRORS: error: invalid operand for instruction