The inline asm operand modifier 'n' is suppose
to be generic across architectures. It has the
following description in the gnu sources:
Negate the immediate constant
Several Architectures such as x86 have local implementations
of operand modifier 'n' which go beyond the above description
slightly. This won't affect them.
Affected files:
lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
Added 'n' to the switch cases.
test/CodeGen/Generic/asm-large-immediate.ll
Generic compiled test (x86 for me)
test/CodeGen/Mips/asm-large-immediate.ll
Mips compiled version of the generic one
Contributer: Jack Carter
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158939 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp b/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
index 58716b7..db43b06 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
@@ -420,10 +420,15 @@
default:
return true; // Unknown modifier.
case 'c': // Substitute immediate value without immediate syntax
- if ((MO.getType()) != MachineOperand::MO_Immediate)
+ if (MO.getType() != MachineOperand::MO_Immediate)
return true;
O << MO.getImm();
return false;
+ case 'n': // Negate the immediate constant.
+ if (MO.getType() != MachineOperand::MO_Immediate)
+ return true;
+ O << -MO.getImm();
+ return false;
}
}
return true;