[PATCH] D154762: [LoongArch] Implement isLegalAddImmediate

[Lu Weining via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG42dccf9c16f6: [LoongArch] Implement isLegalAddImmediate (authored by hev, committed by SixWeining).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D154762/new/

https://reviews.llvm.org/D154762

Files:
  llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
  llvm/lib/Target/LoongArch/LoongArchISelLowering.h
  llvm/test/CodeGen/LoongArch/ir-instruction/and.ll


Index: llvm/test/CodeGen/LoongArch/ir-instruction/and.ll
===================================================================
--- llvm/test/CodeGen/LoongArch/ir-instruction/and.ll
+++ llvm/test/CodeGen/LoongArch/ir-instruction/and.ll
@@ -428,16 +428,14 @@
 define i32 @and_add_lsr(i32 %x, i32 %y) {
 ; LA32-LABEL: and_add_lsr:
 ; LA32:       # %bb.0:
-; LA32-NEXT:    ori $a2, $zero, 4095
-; LA32-NEXT:    add.w $a0, $a0, $a2
+; LA32-NEXT:    addi.w $a0, $a0, -1
 ; LA32-NEXT:    srli.w $a1, $a1, 20
 ; LA32-NEXT:    and $a0, $a1, $a0
 ; LA32-NEXT:    ret
 ;
 ; LA64-LABEL: and_add_lsr:
 ; LA64:       # %bb.0:
-; LA64-NEXT:    ori $a2, $zero, 4095
-; LA64-NEXT:    add.d $a0, $a0, $a2
+; LA64-NEXT:    addi.d $a0, $a0, -1
 ; LA64-NEXT:    bstrpick.d $a1, $a1, 31, 20
 ; LA64-NEXT:    and $a0, $a1, $a0
 ; LA64-NEXT:    ret
Index: llvm/lib/Target/LoongArch/LoongArchISelLowering.h
===================================================================
--- llvm/lib/Target/LoongArch/LoongArchISelLowering.h
+++ llvm/lib/Target/LoongArch/LoongArchISelLowering.h
@@ -202,6 +202,8 @@
                              unsigned AS,
                              Instruction *I = nullptr) const override;
 
+  bool isLegalAddImmediate(int64_t Imm) const override;
+
   bool hasAndNotCompare(SDValue Y) const override;
 
   bool convertSelectOfConstantsToMath(EVT VT) const override { return true; }
Index: llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
===================================================================
--- llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
+++ llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
@@ -3247,6 +3247,10 @@
   return true;
 }
 
+bool LoongArchTargetLowering::isLegalAddImmediate(int64_t Imm) const {
+  return isInt<12>(Imm);
+}
+
 bool LoongArchTargetLowering::hasAndNotCompare(SDValue Y) const {
   // TODO: Support vectors.
   if (Y.getValueType().isVector())


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D154762.543429.patch
Type: text/x-patch
Size: 1903 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20230724/e3ed953c/attachment.bin>