[llvm] [PowerPC] Add test after #75271 on PPC. NFC. (PR #75616)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,84 @@
+# RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -verify-coalescing -run-pass=register-coalescer \
+# RUN:   -o - %s | FileCheck %s
+---
+name:            _Z13testTransposeIfLj31ELj17EEvv
+alignment:       16
+exposesReturnsTwice: false
+legalized:       false
+regBankSelected: false
+selected:        false
+failedISel:      false
+tracksRegLiveness: true
+hasWinCFI:       false
+callsEHReturn:   false
+callsUnwindInit: false
+hasEHCatchret:   false
+hasEHScopes:     false
+hasEHFunclets:   false
+isOutlined:      false
+debugInstrRef:   false
+failsVerification: false
+tracksDebugUserValues: false
+registers:
+  - { id: 3968, class: vsrc, preferred-register: '' }
+  - { id: 3974, class: vsrc, preferred-register: '' }
+  - { id: 5081, class: vssrc, preferred-register: '' }
+liveins:         []
+frameInfo:
+  isFrameAddressTaken: false
+  isReturnAddressTaken: false
+  hasStackMap:     false
+  hasPatchPoint:   false
+  stackSize:       0
+  offsetAdjustment: 0
+  maxAlignment:    128
+  adjustsStack:    false
+  hasCalls:        false
+  stackProtector:  ''
+  functionContext: ''
+  maxCallFrameSize: 4294967295
+  cvBytesOfCalleeSavedRegisters: 0
+  hasOpaqueSPAdjustment: false
+  hasVAStart:      false
+  hasMustTailInVarArgFunc: false
+  hasTailCall:     false
+  localFrameSize:  0
+  savePoint:       ''
+  restorePoint:    ''
+fixedStack:      []
+stack:
+  - { id: 0, name: '', type: default, offset: 0, size: 128, alignment: 128, 
+      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
+      local-offset: -128, debug-info-variable: '', debug-info-expression: '', 
+      debug-info-location: '' }
+  - { id: 1, name: '', type: default, offset: 0, size: 4096, alignment: 16, 
+      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
+      local-offset: -4224, debug-info-variable: '', debug-info-expression: '', 
+      debug-info-location: '' }
+entry_values:    []
+callSites:       []
+debugValueSubstitutions: []
+constants:       []
+machineFunctionInfo: {}
+body:             |
+  ; CHECK-LABEL: name:            _Z13testTransposeIfLj31ELj17EEvv
+  ; CHECK: undef %[[REG:[0-9]+]].sub_64:vsrc = IMPLICIT_DEF implicit-def %[[REG]]
+  bb.0:
+    successors: %bb.2(0x80000000)
+    liveins: $x2
+  
+    %5081:vssrc = IMPLICIT_DEF
----------------
arsenm wrote:

-run-pass=none will compact these numbers 

https://github.com/llvm/llvm-project/pull/75616