[llvm] 6d9065a - Revert "[ARM] Correctly handle execute-only in EmitStructByval"

[Caslyn Tonelli via llvm-commits]

Author: Caslyn Tonelli
Date: 2023-07-12T23:29:54Z
New Revision: 6d9065a7164b8f3eb1b3e3a17870cf9a51df4cbd

URL: https://github.com/llvm/llvm-project/commit/6d9065a7164b8f3eb1b3e3a17870cf9a51df4cbd
DIFF: https://github.com/llvm/llvm-project/commit/6d9065a7164b8f3eb1b3e3a17870cf9a51df4cbd.diff

LOG: Revert "[ARM] Correctly handle execute-only in EmitStructByval"

This reverts commit 210f61cbddeddac47b347db072d674ee142520f6.

Differential Revision: https://reviews.llvm.org/D155138

Added: 
    

Modified: 
    llvm/lib/Target/ARM/ARMISelLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 3cdc01973d33ef..c7c61cdd229dbe 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -11513,12 +11513,18 @@ ARMTargetLowering::EmitStructByval(MachineInstr &MI,
   // Load an immediate to varEnd.
   Register varEnd = MRI.createVirtualRegister(TRC);
   if (Subtarget->useMovt()) {
-    BuildMI(BB, dl, TII->get(IsThumb ? ARM::t2MOVi32imm : ARM::MOVi32imm),
-            varEnd)
-        .addImm(LoopSize);
-  } else if (Subtarget->genExecuteOnly()) {
-    assert(IsThumb && "Non-thumb expected to have used movt");
-    BuildMI(BB, dl, TII->get(ARM::tMOVi32imm), varEnd).addImm(LoopSize);
+    unsigned Vtmp = varEnd;
+    if ((LoopSize & 0xFFFF0000) != 0)
+      Vtmp = MRI.createVirtualRegister(TRC);
+    BuildMI(BB, dl, TII->get(IsThumb ? ARM::t2MOVi16 : ARM::MOVi16), Vtmp)
+        .addImm(LoopSize & 0xFFFF)
+        .add(predOps(ARMCC::AL));
+
+    if ((LoopSize & 0xFFFF0000) != 0)
+      BuildMI(BB, dl, TII->get(IsThumb ? ARM::t2MOVTi16 : ARM::MOVTi16), varEnd)
+          .addReg(Vtmp)
+          .addImm(LoopSize >> 16)
+          .add(predOps(ARMCC::AL));
   } else {
     MachineConstantPool *ConstantPool = MF->getConstantPool();
     Type *Int32Ty = Type::getInt32Ty(MF->getFunction().getContext());