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MC/X86: Warn on scale factors > 1 without index register, instead of erroring,
for 'as' compatibility. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111945 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -588,7 +588,7 @@ X86Operand *X86ATTAsmParser::ParseMemOperand(unsigned SegReg, SMLoc MemStart) {
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}
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}
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} else if (getLexer().isNot(AsmToken::RParen)) {
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// Otherwise we have the unsupported form of a scale amount without an
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// A scale amount without an index is ignored.
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// index.
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SMLoc Loc = Parser.getTok().getLoc();
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@ -596,8 +596,9 @@ X86Operand *X86ATTAsmParser::ParseMemOperand(unsigned SegReg, SMLoc MemStart) {
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if (getParser().ParseAbsoluteExpression(Value))
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return 0;
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Error(Loc, "cannot have scale factor without index register");
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return 0;
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if (Value != 1)
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Warning(Loc, "scale factor without index register is ignored");
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Scale = 1;
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}
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}
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@ -1,4 +1,6 @@
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// RUN: llvm-mc -triple x86_64-unknown-unknown %s | FileCheck %s
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// RUN: llvm-mc -triple x86_64-unknown-unknown %s > %t 2> %t.err
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// RUN: FileCheck < %t %s
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// RUN: FileCheck --check-prefix=CHECK-STDERR < %t.err %s
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// CHECK: subb %al, %al
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subb %al, %al
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@ -151,3 +153,8 @@ fadd %st(7)
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// CHECK: int3
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INT3
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// Allow scale factor without index register.
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// CHECK: movaps %xmm3, (%esi)
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// CHECK-STDERR: warning: scale factor without index register is ignored
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movaps %xmm3, (%esi, 2)
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