[llvm-commits] [llvm] r156284 - in /llvm/trunk: lib/Target/Mips/MipsISelLowering.cpp test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll test/CodeGen/Mips/inlineasm_constraint.ll

[Eric Christopher]

Author: echristo
Date: Mon May  7 00:46:43 2012
New Revision: 156284

URL: http://llvm.org/viewvc/llvm-project?rev=156284&view=rev
Log:
Add support for the 'N' inline asm constraint.

Patch by Jack Carter.

Added:
    llvm/trunk/test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll
Modified:
    llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
    llvm/trunk/test/CodeGen/Mips/inlineasm_constraint.ll

Modified: llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp?rev=156284&r1=156283&r2=156284&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp Mon May  7 00:46:43 2012
@@ -3043,6 +3043,7 @@
   case 'J': // integer zero
   case 'K': // unsigned 16 bit immediate
   case 'L': // signed 32 bit immediate where lower 16 bits are 0
+  case 'N': // immediate in the range of -65535 to -1 (inclusive)
     if (isa<ConstantInt>(CallOperandVal))
       weight = CW_Constant;
     break;
@@ -3135,6 +3136,16 @@
       }
     }
     return;
+  case 'N': // immediate in the range of -65535 to -1 (inclusive)
+    if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
+      EVT Type = Op.getValueType();
+      int64_t Val = C->getSExtValue();
+      if ((Val >= -65535) && (Val <= -1)) {
+        Result = DAG.getTargetConstant(Val, Type);
+        break;
+      }
+    }
+    return;
   }
 
   if (Result.getNode()) {

Added: llvm/trunk/test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll?rev=156284&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll (added)
+++ llvm/trunk/test/CodeGen/Mips/inlineasm-cnstrnt-bad-N.ll Mon May  7 00:46:43 2012
@@ -0,0 +1,17 @@
+ 
+;This is a negative test. The constant value given for the constraint (N).
+;immediate in the range of -65535 to -1 (inclusive).
+;Our example uses the positive value 3.
+;
+; RUN: not llc -march=mipsel < %s  2> %t
+; RUN: FileCheck --check-prefix=CHECK-ERRORS < %t %s
+
+define i32 @main() nounwind {
+entry:
+
+;CHECK-ERRORS:	error: invalid operand for inline asm constraint 'N'
+
+  tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 3) nounwind
+  ret i32 0
+}
+

Modified: llvm/trunk/test/CodeGen/Mips/inlineasm_constraint.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/inlineasm_constraint.ll?rev=156284&r1=156283&r2=156284&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/inlineasm_constraint.ll (original)
+++ llvm/trunk/test/CodeGen/Mips/inlineasm_constraint.ll Mon May  7 00:46:43 2012
@@ -33,5 +33,11 @@
 ; CHECK: #NO_APP	
   tail call i32 asm sideeffect "add $0,$1,$3\0A\09", "=r,r,L,r"(i32 7, i32 1048576, i32 0) nounwind
 
+; Now N with -3
+; CHECK: #APP
+; CHECK: addi ${{[0-9]+}},${{[0-9]+}},-3
+; CHECK: #NO_APP	
+  tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,N"(i32 7, i32 -3) nounwind
+
   ret i32 0
 }