Set change right after adding implict use of frm.

Yeting Kuo · Yeting Kuo · commit 6bceb5366074 · 2024-01-18T15:21:13.000+08:00
diff --git a/llvm/lib/Target/RISCV/RISCVInsertReadWriteCSR.cpp b/llvm/lib/Target/RISCV/RISCVInsertReadWriteCSR.cpp
@@ -105,6 +105,7 @@ bool RISCVInsertReadWriteCSR::emitWriteRoundingModeOpt(MachineBasicBlock &MBB) {
     // Make MI implicit use FRM.
     MI.addOperand(MachineOperand::CreateReg(RISCV::FRM, /*IsDef*/ false,
                                             /*IsImp*/ true));
+    Changed = true;
 
     // Skip if MI uses same rounding mode as FRM.
     if (InstrRM == CurrentRM)
@@ -122,7 +123,6 @@ bool RISCVInsertReadWriteCSR::emitWriteRoundingModeOpt(MachineBasicBlock &MBB) {
           .addImm(InstrRM);
     }
     CurrentRM = InstrRM;
-    Changed = true;
   }
 
   // Restore FRM if needed.

Original file line number	Diff line number	Diff line change
`@@ -105,6 +105,7 @@ bool RISCVInsertReadWriteCSR::emitWriteRoundingModeOpt(MachineBasicBlock &MBB) {`
`105`	`105`	`// Make MI implicit use FRM.`
`106`	`106`	`MI.addOperand(MachineOperand::CreateReg(RISCV::FRM, /IsDef/ false,`
`107`	`107`	`/IsImp/ true));`
	`108`	`+ Changed = true;`
`108`	`109`
`109`	`110`	`// Skip if MI uses same rounding mode as FRM.`
`110`	`111`	`if (InstrRM == CurrentRM)`
`@@ -122,7 +123,6 @@ bool RISCVInsertReadWriteCSR::emitWriteRoundingModeOpt(MachineBasicBlock &MBB) {`
`122`	`123`	`.addImm(InstrRM);`
`123`	`124`	`}`
`124`	`125`	`CurrentRM = InstrRM;`
`125`		`- Changed = true;`
`126`	`126`	`}`
`127`	`127`
`128`	`128`	`// Restore FRM if needed.`