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MC/X86: Add temporary hack to match shrl $1,%eax correctly, to support testing

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other functionality on 403.gcc compiled at -O0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98405 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2010-03-13 00:47:29 +00:00
parent 69c695ee47
commit d5e7705a05
2 changed files with 12 additions and 0 deletions
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9
lib/Target/X86/AsmParser/X86AsmParser.cpp
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@ -542,6 +542,15 @@ ParseInstruction(const StringRef &Name, SMLoc NameLoc,
} }
} }
// FIXME: Hack to handle recognizing s{hr,ar,hl}? $1.
if ((Name.startswith("shr") || Name.startswith("sar") ||
Name.startswith("shl")) &&
Operands.size() == 3 &&
static_cast<X86Operand*>(Operands[1])->isImm() &&
isa<MCConstantExpr>(static_cast<X86Operand*>(Operands[1])->getImm()) &&
cast<MCConstantExpr>(static_cast<X86Operand*>(Operands[1])->getImm())->getValue() == 1)
Operands.erase(Operands.begin() + 1);
return false; return false;
} }

3
test/MC/AsmParser/X86/x86_32-new-encoder.s
View File

@ -47,3 +47,6 @@ rdtscp
// CHECK: addw %ax, %ax # encoding: [0x66,0x01,0xc0] // CHECK: addw %ax, %ax # encoding: [0x66,0x01,0xc0]
addw %ax, %ax addw %ax, %ax
// CHECK: shrl %eax # encoding: [0xd1,0xe8]
shrl $1, %eax