[llvm-commits] [llvm] r111945 - in /llvm/trunk: lib/Target/X86/AsmParser/X86AsmParser.cpp test/MC/AsmParser/X86/x86_instructions.s
Daniel Dunbar
daniel at zuster.org
Tue Aug 24 12:13:38 PDT 2010
Author: ddunbar
Date: Tue Aug 24 14:13:38 2010
New Revision: 111945
URL: http://llvm.org/viewvc/llvm-project?rev=111945&view=rev
Log:
MC/X86: Warn on scale factors > 1 without index register, instead of erroring,
for 'as' compatibility.
Modified:
llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
llvm/trunk/test/MC/AsmParser/X86/x86_instructions.s
Modified: llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp?rev=111945&r1=111944&r2=111945&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp (original)
+++ llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp Tue Aug 24 14:13:38 2010
@@ -588,7 +588,7 @@
}
}
} else if (getLexer().isNot(AsmToken::RParen)) {
- // Otherwise we have the unsupported form of a scale amount without an
+ // A scale amount without an index is ignored.
// index.
SMLoc Loc = Parser.getTok().getLoc();
@@ -596,8 +596,9 @@
if (getParser().ParseAbsoluteExpression(Value))
return 0;
- Error(Loc, "cannot have scale factor without index register");
- return 0;
+ if (Value != 1)
+ Warning(Loc, "scale factor without index register is ignored");
+ Scale = 1;
}
}
Modified: llvm/trunk/test/MC/AsmParser/X86/x86_instructions.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/AsmParser/X86/x86_instructions.s?rev=111945&r1=111944&r2=111945&view=diff
==============================================================================
--- llvm/trunk/test/MC/AsmParser/X86/x86_instructions.s (original)
+++ llvm/trunk/test/MC/AsmParser/X86/x86_instructions.s Tue Aug 24 14:13:38 2010
@@ -1,4 +1,6 @@
-// RUN: llvm-mc -triple x86_64-unknown-unknown %s | FileCheck %s
+// RUN: llvm-mc -triple x86_64-unknown-unknown %s > %t 2> %t.err
+// RUN: FileCheck < %t %s
+// RUN: FileCheck --check-prefix=CHECK-STDERR < %t.err %s
// CHECK: subb %al, %al
subb %al, %al
@@ -151,3 +153,8 @@
// CHECK: int3
INT3
+
+// Allow scale factor without index register.
+// CHECK: movaps %xmm3, (%esi)
+// CHECK-STDERR: warning: scale factor without index register is ignored
+movaps %xmm3, (%esi, 2)
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