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-rw-r--r--lib/Target/Mips/MipsISelLowering.cpp11
-rw-r--r--test/CodeGen/Mips/inlineasm-cnstrnt-bad-J.ll16
-rw-r--r--test/CodeGen/Mips/inlineasm_constraint.ll6
3 files changed, 33 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index 13665ee89a..97332cf00d 100644
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -3040,6 +3040,7 @@ MipsTargetLowering::getSingleConstraintMatchWeight(
weight = CW_Register;
break;
case 'I': // signed 16 bit immediate
+ case 'J': // integer zero
if (isa<ConstantInt>(CallOperandVal))
weight = CW_Constant;
break;
@@ -3102,6 +3103,16 @@ void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
}
}
return;
+ case 'J': // integer zero
+ if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
+ EVT Type = Op.getValueType();
+ int64_t Val = C->getZExtValue();
+ if (Val == 0) {
+ Result = DAG.getTargetConstant(0, Type);
+ break;
+ }
+ }
+ return;
}
if (Result.getNode()) {
diff --git a/test/CodeGen/Mips/inlineasm-cnstrnt-bad-J.ll b/test/CodeGen/Mips/inlineasm-cnstrnt-bad-J.ll
new file mode 100644
index 0000000000..1fdf672fe1
--- /dev/null
+++ b/test/CodeGen/Mips/inlineasm-cnstrnt-bad-J.ll
@@ -0,0 +1,16 @@
+;
+;This is a negative test. The constant value given for the constraint (J)
+;is non-zero (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 'J'
+
+ tail call i32 asm "addi $0,$1,$2", "=r,r,J"(i32 1024, i32 3) nounwind
+ ret i32 0
+}
+
diff --git a/test/CodeGen/Mips/inlineasm_constraint.ll b/test/CodeGen/Mips/inlineasm_constraint.ll
index e2fbaa772e..f053e0e276 100644
--- a/test/CodeGen/Mips/inlineasm_constraint.ll
+++ b/test/CodeGen/Mips/inlineasm_constraint.ll
@@ -15,6 +15,12 @@ entry:
; CHECK: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,$2", "=r,r,I"(i32 7, i32 -3) nounwind
+; Now J with 0
+; CHECK: #APP
+; CHECK: addi ${{[0-9]+}},${{[0-9]+}},0
+; CHECK: #NO_APP
+ tail call i32 asm sideeffect "addi $0,$1,$2\0A\09 ", "=r,r,J"(i32 7, i16 0) nounwind
+
ret i32 0
}