[PPC] Add DwarfRegAlias for VSRPair (llvm#95837)

syzaara · AlexisPerry · commit 488ea4d74b91 · 2024-06-27T14:46:17.000-06:00
Add DwarfRegAlias for VSRPair as it shares dwarfRegNum with the VR
registers.
diff --git a/llvm/lib/Target/PowerPC/PPCRegisterInfo.td b/llvm/lib/Target/PowerPC/PPCRegisterInfo.td
@@ -199,7 +199,7 @@ let SubRegIndices = [sub_vsx0, sub_vsx1] in {
     def VSRp#!add(!srl(Index, 1), 16) :
       VSRPair<!add(!srl(Index, 1), 16), "vsp"#!add(Index, 32),
               [!cast<VR>("V"#Index), !cast<VR>("V"#!add(Index, 1))]>,
-      DwarfRegNum<[-1, -1]>;
+              DwarfRegAlias<!cast<VR>("V"#Index)>;
   }
 }
 
diff --git a/llvm/test/CodeGen/PowerPC/ppc64-anyregcc.ll b/llvm/test/CodeGen/PowerPC/ppc64-anyregcc.ll
@@ -1,4 +1,5 @@
 ; RUN: llc -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -mcpu=pwr10 -verify-machineinstrs < %s | FileCheck %s
 target datalayout = "E-m:e-i64:64-n32:64"
 target triple = "powerpc64-unknown-linux-gnu"
 

Original file line number	Diff line number	Diff line change
`@@ -199,7 +199,7 @@ let SubRegIndices = [sub_vsx0, sub_vsx1] in {`
`199`	`199`	`def VSRp#!add(!srl(Index, 1), 16) :`
`200`	`200`	`VSRPair<!add(!srl(Index, 1), 16), "vsp"#!add(Index, 32),`
`201`	`201`	`[!cast<VR>("V"#Index), !cast<VR>("V"#!add(Index, 1))]>,`
`202`		`- DwarfRegNum<[-1, -1]>;`
	`202`	`+ DwarfRegAlias<!cast<VR>("V"#Index)>;`
`203`	`203`	`}`
`204`	`204`	`}`
`205`	`205`
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`; RUN: llc -verify-machineinstrs < %s \| FileCheck %s`
	`2`	`+; RUN: llc -mcpu=pwr10 -verify-machineinstrs < %s \| FileCheck %s`
`2`	`3`	`target datalayout = "E-m:e-i64:64-n32:64"`
`3`	`4`	`target triple = "powerpc64-unknown-linux-gnu"`
`4`	`5`