[llvm] [PowerPC] Spill non-volatile registers required for traceback table (PR #71115)

[Stefan Pintilie via llvm-commits]

================
@@ -15,294 +15,1036 @@
 ; RUN:   FileCheck --check-prefix=ASM64 %s
 
 
-define dso_local void @vec_regs() {
+define dso_local void @vec_regs() #0 {
 entry:
   call void asm sideeffect "", "~{v13},~{v20},~{v26},~{v31}"()
   ret void
 }
 
 ; MIR32:         name:            vec_regs
 
-; MIR32-LABEL:   fixedStack:
-; MIR32-NEXT:    - { id: 0, type: spill-slot, offset: -16, size: 16, alignment: 16, stack-id: default,
-; MIR32-NEXT:        callee-saved-register: '$v31', callee-saved-restored: true, debug-info-variable: '',
-; MIR32-NEXT:        debug-info-expression: '', debug-info-location: '' }
-; MIR32-NEXT:    - { id: 1, type: spill-slot, offset: -96, size: 16, alignment: 16, stack-id: default,
-; MIR32-NEXT:        callee-saved-register: '$v26', callee-saved-restored: true, debug-info-variable: '',
-; MIR32-NEXT:        debug-info-expression: '', debug-info-location: '' }
-; MIR32-NEXT:    - { id: 2, type: spill-slot, offset: -192, size: 16, alignment: 16, stack-id: default,
-; MIR32-NEXT:        callee-saved-register: '$v20', callee-saved-restored: true, debug-info-variable: '',
-; MIR32-NEXT:        debug-info-expression: '', debug-info-location: '' }
+; MIR32-LABEL:  fixedStack:
+; MIR32-NEXT:     - { id: 0, type: spill-slot, offset: -16, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v31', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 1, type: spill-slot, offset: -32, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v30', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 2, type: spill-slot, offset: -48, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v29', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 3, type: spill-slot, offset: -64, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v28', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 4, type: spill-slot, offset: -80, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v27', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 5, type: spill-slot, offset: -96, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v26', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 6, type: spill-slot, offset: -112, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v25', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 7, type: spill-slot, offset: -128, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v24', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 8, type: spill-slot, offset: -144, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v23', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 9, type: spill-slot, offset: -160, size: 16, alignment: 16, stack-id: default,
+; MIR32-NEXT:         callee-saved-register: '$v22', callee-saved-restored: true, debug-info-variable: '',
+; MIR32-NEXT:         debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 10, type: spill-slot, offset: -176, size: 16, alignment: 16,
+; MIR32-NEXT:         stack-id: default, callee-saved-register: '$v21', callee-saved-restored: true,
+; MIR32-NEXT:         debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+; MIR32-NEXT:     - { id: 11, type: spill-slot, offset: -192, size: 16, alignment: 16,
+; MIR32-NEXT:         stack-id: default, callee-saved-register: '$v20', callee-saved-restored: true,
+; MIR32-NEXT:         debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
 ; MIR32-NEXT:    stack:
 
-; MIR32:         liveins: $v20, $v26, $v31
+; MIR32: liveins: $v20, $v21, $v22, $v23, $v24, $v25, $v26, $v27, $v28, $v29, $v30, $v31
 
-; MIR32-DAG:     STXVD2X killed $v20, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.2)
-; MIR32-DAG:     STXVD2X killed $v26, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.1)
-; MIR32-DAG:     STXVD2X killed $v31, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.0)
+; MIR32-DAG:     STXVD2X killed $v20, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.11)
+; MIR32-DAG:     STXVD2X killed $v21, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.10)
+; MIR32-DAG:     STXVD2X killed $v22, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.9)
+; MIR32-DAG:     STXVD2X killed $v23, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.8)
+; MIR32-DAG:     STXVD2X killed $v24, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.7)
+; MIR32-DAG:     STXVD2X killed $v25, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.6)
+; MIR32-DAG:     STXVD2X killed $v26, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.5)
+; MIR32-DAG:     STXVD2X killed $v27, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.4)
+; MIR32-DAG:     STXVD2X killed $v28, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.3)
+; MIR32-DAG:     STXVD2X killed $v29, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.2)
+; MIR32-DAG:     STXVD2X killed $v30, $r1, killed $r{{[0-9]+}} :: (store (s128) into %fixed-stack.1)
----------------
stefanp-ibm wrote:

We don't seem to be saving `v31` anymore. Is that expected?

https://github.com/llvm/llvm-project/pull/71115