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

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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,

llvm-svn: 277654
This commit is contained in:
Bruno Cardoso Lopes 2016-08-03 21:26:21 +00:00
parent 859253a79c
commit 504ebe5678
2 changed files with 1 additions and 20 deletions
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4
lib/Target/ARM/ARMISelDAGToDAG.cpp
View File

@ -476,9 +476,7 @@ bool ARMDAGToDAGISel::isShifterOpProfitable(const SDValue &Shift,
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

17
test/CodeGen/ARM/subtarget-no-movt.ll
View File

@ -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" }