Implement the immediate part of the 'B' modifier.

Part of rdar://9119939

llvm-svn: 132023

2 files changed, 13 insertions, 1 deletions

diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
index ac61c033a54..f1edc55120b 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -417,6 +417,10 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
       }
       // Fallthrough to unsupported.
     case 'B': // Bitwise inverse of integer or symbol without a preceding #.
+      if (!MI->getOperand(OpNum).isImm())
+        return true;
+      O << ~(MI->getOperand(OpNum).getImm());
+      return false;
     case 'L': // The low 16 bits of an immediate constant.
     case 'm': // The base register of a memory operand.
     case 'M': // A register range suitable for LDM/STM.
diff --git a/llvm/test/CodeGen/ARM/arm-modifier.ll b/llvm/test/CodeGen/ARM/arm-modifier.ll
index 051d7e7780a..6b0da44ed55 100644
--- a/llvm/test/CodeGen/ARM/arm-modifier.ll
+++ b/llvm/test/CodeGen/ARM/arm-modifier.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=arm -mattr=+vfp2
+; RUN: llc < %s -march=arm -mattr=+vfp2 | FileCheck %s
 
 define i32 @foo(float %scale, float %scale2) nounwind ssp {
 entry:
@@ -13,3 +13,11 @@ entry:
 }
 
 !0 = metadata !{i32 56, i32 89, i32 128, i32 168}
+
+define void @f0() nounwind ssp {
+entry:
+; CHECK: f0
+; CHECK: .word -1
+call void asm sideeffect ".word ${0:B} \0A\09", "i"(i32 0) nounwind, !srcloc !0
+ret void
+}