AMDGPU/SI: Remove EXECReg

For the same reasons as the other physical registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244062 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/AMDGPU/SIInstrInfo.cpp b/lib/Target/AMDGPU/SIInstrInfo.cpp
index aff4a57e1fa4ec93700e9dd70a412b1cfd9f7e07..a3456401c726c107ec1f368c61c7f6df19fca1c5 100644 (file)
--- a/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ b/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -898,11 +898,6 @@ bool SIInstrInfo::isMov(unsigned Opcode) const {
   }
 }
 
-bool
-SIInstrInfo::isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
-  return RC != &AMDGPU::EXECRegRegClass;
-}
-
 static void removeModOperands(MachineInstr &MI) {
   unsigned Opc = MI.getOpcode();
   int Src0ModIdx = AMDGPU::getNamedOperandIdx(Opc,

diff --git a/lib/Target/AMDGPU/SIInstrInfo.h b/lib/Target/AMDGPU/SIInstrInfo.h
index da60ad372dbee1c6aeb6a601a1bc4a93a955e2b3..54baf802ed7b17e099ce5761a84f2935eb3f6543 100644 (file)
--- a/lib/Target/AMDGPU/SIInstrInfo.h
+++ b/lib/Target/AMDGPU/SIInstrInfo.h
@@ -132,8 +132,6 @@ public:
                               unsigned DstReg, unsigned SrcReg) const override;
   bool isMov(unsigned Opcode) const override;
 
-  bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const override;
-
   bool FoldImmediate(MachineInstr *UseMI, MachineInstr *DefMI,
                      unsigned Reg, MachineRegisterInfo *MRI) const final;
 

diff --git a/lib/Target/AMDGPU/SIInstructions.td b/lib/Target/AMDGPU/SIInstructions.td
index af20f8d21779c76663cb5c14d8f0a895283399a4..c28f138bb6f7da02dbe2b70d2c0f2cb28dfedfe9 100644 (file)
--- a/lib/Target/AMDGPU/SIInstructions.td
+++ b/lib/Target/AMDGPU/SIInstructions.td
@@ -458,16 +458,16 @@ def S_CBRANCH_VCCNZ : SOPP <
   "s_cbranch_vccnz $simm16"
 >;
 
-let DisableEncoding = "$exec" in {
+let Uses = [EXEC] in {
 def S_CBRANCH_EXECZ : SOPP <
-  0x00000008, (ins sopp_brtarget:$simm16, EXECReg:$exec),
+  0x00000008, (ins sopp_brtarget:$simm16),
   "s_cbranch_execz $simm16"
 >;
 def S_CBRANCH_EXECNZ : SOPP <
-  0x00000009, (ins sopp_brtarget:$simm16, EXECReg:$exec),
+  0x00000009, (ins sopp_brtarget:$simm16),
   "s_cbranch_execnz $simm16"
 >;
-} // End DisableEncoding = "$exec"
+} // End Uses = [EXEC]
 
 
 } // End isBranch = 1

diff --git a/lib/Target/AMDGPU/SILowerControlFlow.cpp b/lib/Target/AMDGPU/SILowerControlFlow.cpp
index c319b32111feb5e2702c24def97d4000ed29df75..1d6627fb18a75fb7f6c8147e1fd97dbf4fb8461b 100644 (file)
--- a/lib/Target/AMDGPU/SILowerControlFlow.cpp
+++ b/lib/Target/AMDGPU/SILowerControlFlow.cpp
@@ -140,8 +140,7 @@ void SILowerControlFlowPass::Skip(MachineInstr &From, MachineOperand &To) {
 
   DebugLoc DL = From.getDebugLoc();
   BuildMI(*From.getParent(), &From, DL, TII->get(AMDGPU::S_CBRANCH_EXECZ))
-          .addOperand(To)
-          .addReg(AMDGPU::EXEC);
+    .addOperand(To);
 }
 
 void SILowerControlFlowPass::SkipIfDead(MachineInstr &MI) {
@@ -159,8 +158,7 @@ void SILowerControlFlowPass::SkipIfDead(MachineInstr &MI) {
 
   // If the exec mask is non-zero, skip the next two instructions
   BuildMI(MBB, Insert, DL, TII->get(AMDGPU::S_CBRANCH_EXECNZ))
-          .addImm(3)
-          .addReg(AMDGPU::EXEC);
+    .addImm(3);
 
   // Exec mask is zero: Export to NULL target...
   BuildMI(MBB, Insert, DL, TII->get(AMDGPU::EXP))
@@ -269,8 +267,7 @@ void SILowerControlFlowPass::Loop(MachineInstr &MI) {
           .addReg(Src);
 
   BuildMI(MBB, &MI, DL, TII->get(AMDGPU::S_CBRANCH_EXECNZ))
-          .addOperand(MI.getOperand(1))
-          .addReg(AMDGPU::EXEC);
+    .addOperand(MI.getOperand(1));
 
   MI.eraseFromParent();
 }
@@ -385,8 +382,7 @@ void SILowerControlFlowPass::LoadM0(MachineInstr &MI, MachineInstr *MovRel, int
 
     // Loop back to V_READFIRSTLANE_B32 if there are still variants to cover
     BuildMI(MBB, &MI, DL, TII->get(AMDGPU::S_CBRANCH_EXECNZ))
-            .addImm(-7)
-            .addReg(AMDGPU::EXEC);
+      .addImm(-7);
 
     // Restore EXEC
     BuildMI(MBB, &MI, DL, TII->get(AMDGPU::S_MOV_B64), AMDGPU::EXEC)

diff --git a/lib/Target/AMDGPU/SIRegisterInfo.td b/lib/Target/AMDGPU/SIRegisterInfo.td
index bf410ad3538ada8e4b03f8f2c4d654a26e3b843d..31480ae6135c5a40c3ebbec144a42ad3fdc68085 100644 (file)
--- a/lib/Target/AMDGPU/SIRegisterInfo.td
+++ b/lib/Target/AMDGPU/SIRegisterInfo.td
@@ -183,7 +183,6 @@ class RegImmMatcher<string name> : AsmOperandClass {
 }
 
 def VCCReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add VCC)>;
-def EXECReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add EXEC)>;
 
 // Register class for all scalar registers (SGPRs + Special Registers)
 def SReg_32 : RegisterClass<"AMDGPU", [i32, f32], 32,
@@ -193,7 +192,7 @@ def SReg_32 : RegisterClass<"AMDGPU", [i32, f32], 32,
 def SGPR_64 : RegisterClass<"AMDGPU", [v2i32, i64, f64], 64, (add SGPR_64Regs)>;
 
 def SReg_64 : RegisterClass<"AMDGPU", [v2i32, i64, f64, i1], 64,
-  (add SGPR_64, VCCReg, EXECReg, FLAT_SCR)
+  (add SGPR_64, VCCReg, EXEC, FLAT_SCR)
 >;
 
 def SReg_128 : RegisterClass<"AMDGPU", [v4i32, v16i8], 128, (add SGPR_128)>;