[llvm] r277654 - Revert "[ARM] Constant Materialize: imms with specific value can be encoded into mov.w"

[Bruno Cardoso Lopes via llvm-commits]

Author: bruno
Date: Wed Aug  3 16:26:21 2016
New Revision: 277654

URL: http://llvm.org/viewvc/llvm-project?rev=277654&view=rev
Log:
Revert "[ARM] Constant Materialize: imms with specific value can be encoded into mov.w"

This reverts commit r277610 / d619aa8878c3dafcc0d29a46517f63ff3209fdd4.

This make subtarget-no-movt.ll fail in
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_check/26892,

Modified:
    llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
    llvm/trunk/test/CodeGen/ARM/subtarget-no-movt.ll

Modified: llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp?rev=277654&r1=277653&r2=277654&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp Wed Aug  3 16:26:21 2016
@@ -476,9 +476,7 @@ bool ARMDAGToDAGISel::isShifterOpProfita
 unsigned ARMDAGToDAGISel::ConstantMaterializationCost(unsigned Val) const {
   if (Subtarget->isThumb()) {
     if (Val <= 255) return 1;                               // MOV
-    if (Subtarget->hasV6T2Ops() &&
-        (Val <= 0xffff || ARM_AM::getT2SOImmValSplatVal(Val) != -1))
-      return 1; // MOVW
+    if (Subtarget->hasV6T2Ops() && Val <= 0xffff) return 1; // MOVW
     if (Val <= 510) return 2;                               // MOV + ADDi8
     if (~Val <= 255) return 2;                              // MOV + MVN
     if (ARM_AM::isThumbImmShiftedVal(Val)) return 2;        // MOV + LSL

Modified: llvm/trunk/test/CodeGen/ARM/subtarget-no-movt.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/ARM/subtarget-no-movt.ll?rev=277654&r1=277653&r2=277654&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/ARM/subtarget-no-movt.ll (original)
+++ llvm/trunk/test/CodeGen/ARM/subtarget-no-movt.ll Wed Aug  3 16:26:21 2016
@@ -42,21 +42,4 @@ define i32 @foo1(i32 %a) {
   ret i32 %1
 }
 
-; NO-OPTION-LABEL: {{_?}}foo2
-; NO-OPTION: mov.w	r0, #-536813568
-; NO-OPTION-LABEL-NOT: .long
-
-; USE-MOVT-LABEL: {{_?}}foo2
-; USE-MOVT: mov.w	r0, #-536813568
-; USE-MOVT-NOT: .long
-
-; NO-USE-MOVT-LABEL: {{_?}}foo2
-; NO-USE-MOVT: mov.w	r0, #-536813568
-; NO-USE-MOVT-NOT: .long
-define i32 @foo2() {
-  %1 = load i32, i32* inttoptr (i32 -536813568 to i32*) ; load from 0xe000e000
-  ret i32 %1
-}
-
-
 attributes #0 = { "target-features"="+no-movt" }