[PowerPC][NFC] Add more check directives in only cxx_fast_tlscc lit test.

Use utils/update_llc_test_checks.py to add full CHECK directives to the
test for cxx_fast_tls calling convention. The calling convention is
arguably dead on PowerPC since dropping Darwin subtarget support in the PowerPC
backend. This test change helps show the atrocious code generation for
this lit test which was hidden by having few CHECK directives.

llvm/test/CodeGen/PowerPC/cxx_tlscc64.ll

@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -relocation-model=static -verify-machineinstrs < %s --enable-shrink-wrap=false -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s
 %struct.S = type { i8 }
 
@@ -10,33 +11,102 @@ declare void @_ZN1SC1Ev(%struct.S*)
 declare void @_ZN1SD1Ev(%struct.S*)
 declare i32 @_tlv_atexit(void (i8*)*, i8*, i8*)
 
-; CHECK-LABEL: _ZTW2sg
 define cxx_fast_tlscc nonnull %struct.S* @_ZTW2sg() nounwind {
+; CHECK-LABEL: _ZTW2sg:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    mflr 0
+; CHECK-NEXT:    std 0, 16(1)
+; CHECK-NEXT:    stdu 1, -48(1)
+; CHECK-NEXT:    addis 3, 13, __tls_guard@tprel@ha
+; CHECK-NEXT:    lbz 4, __tls_guard@tprel@l(3)
+; CHECK-NEXT:    andi. 4, 4, 1
+; CHECK-NEXT:    bc 12, 1, .LBB0_2
+; CHECK-NEXT:  # %bb.1: # %init.i
+; CHECK-NEXT:    li 4, 1
+; CHECK-NEXT:    std 31, 40(1) # 8-byte Folded Spill
+; CHECK-NEXT:    mr 31, 14
+; CHECK-NEXT:    mr 14, 15
+; CHECK-NEXT:    mr 15, 16
+; CHECK-NEXT:    mr 16, 17
+; CHECK-NEXT:    stb 4, __tls_guard@tprel@l(3)
+; CHECK-NEXT:    addis 3, 13, sg@tprel@ha
+; CHECK-NEXT:    mr 17, 18
+; CHECK-NEXT:    mr 18, 19
+; CHECK-NEXT:    mr 19, 20
+; CHECK-NEXT:    mr 20, 21
+; CHECK-NEXT:    mr 21, 22
+; CHECK-NEXT:    mr 22, 23
+; CHECK-NEXT:    mr 23, 24
+; CHECK-NEXT:    mr 24, 25
+; CHECK-NEXT:    mr 25, 26
+; CHECK-NEXT:    mr 26, 27
+; CHECK-NEXT:    mr 27, 28
+; CHECK-NEXT:    mr 28, 29
+; CHECK-NEXT:    mr 29, 30
+; CHECK-NEXT:    addi 30, 3, sg@tprel@l
+; CHECK-NEXT:    mr 3, 30
+; CHECK-NEXT:    bl _ZN1SC1Ev
+; CHECK-NEXT:    nop
+; CHECK-NEXT:    addis 3, 2, .LC0@toc@ha
+; CHECK-NEXT:    addis 4, 2, .LC1@toc@ha
+; CHECK-NEXT:    ld 3, .LC0@toc@l(3)
+; CHECK-NEXT:    ld 5, .LC1@toc@l(4)
+; CHECK-NEXT:    mr 4, 30
+; CHECK-NEXT:    mr 30, 29
+; CHECK-NEXT:    mr 29, 28
+; CHECK-NEXT:    mr 28, 27
+; CHECK-NEXT:    mr 27, 26
+; CHECK-NEXT:    mr 26, 25
+; CHECK-NEXT:    mr 25, 24
+; CHECK-NEXT:    mr 24, 23
+; CHECK-NEXT:    mr 23, 22
+; CHECK-NEXT:    mr 22, 21
+; CHECK-NEXT:    mr 21, 20
+; CHECK-NEXT:    mr 20, 19
+; CHECK-NEXT:    mr 19, 18
+; CHECK-NEXT:    mr 18, 17
+; CHECK-NEXT:    mr 17, 16
+; CHECK-NEXT:    mr 16, 15
+; CHECK-NEXT:    mr 15, 14
+; CHECK-NEXT:    mr 14, 31
+; CHECK-NEXT:    ld 31, 40(1) # 8-byte Folded Reload
+; CHECK-NEXT:    bl _tlv_atexit
+; CHECK-NEXT:    nop
+; CHECK-NEXT:  .LBB0_2: # %__tls_init.exit
+; CHECK-NEXT:    addis 3, 13, sg@tprel@ha
+; CHECK-NEXT:    addi 3, 3, sg@tprel@l
+; CHECK-NEXT:    addi 1, 1, 48
+; CHECK-NEXT:    ld 0, 16(1)
+; CHECK-NEXT:    mtlr 0
+; CHECK-NEXT:    blr
   %.b.i = load i1, i1* @__tls_guard, align 1
-; CHECK: bc 12, 1, [[BB_end:.?LBB0_[0-9]+]]
   br i1 %.b.i, label %__tls_init.exit, label %init.i
 
 init.i:
-; CHECK: Folded Spill
   store i1 true, i1* @__tls_guard, align 1
   tail call void @_ZN1SC1Ev(%struct.S* nonnull @sg) #2
-; CHECK: bl _ZN1SC1Ev
   %1 = tail call i32 @_tlv_atexit(void (i8*)* nonnull bitcast (void (%struct.S*)* @_ZN1SD1Ev to void (i8*)*), i8* nonnull getelementptr inbounds (%struct.S, %struct.S* @sg, i64 0, i32 0), i8* nonnull @__dso_handle) #2
-; CHECK: Folded Reload
-; CHECK: _tlv_atexit
   br label %__tls_init.exit
 
-; CHECK: [[BB_end]]:
 __tls_init.exit:
   ret %struct.S* @sg
 }
 
-; CHECK-LABEL: _ZTW4sum1
 define cxx_fast_tlscc nonnull i32* @_ZTW4sum1() nounwind {
+; CHECK-LABEL: _ZTW4sum1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    addis 3, 13, sum1@tprel@ha
+; CHECK-NEXT:    addi 3, 3, sum1@tprel@l
+; CHECK-NEXT:    blr
   ret i32* @sum1
 }
 
 define cxx_fast_tlscc i32* @_ZTW4sum2() #0 {
+; CHECK-LABEL: _ZTW4sum2:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    addis 3, 13, sum1@tprel@ha
+; CHECK-NEXT:    addi 3, 3, sum1@tprel@l
+; CHECK-NEXT:    blr
   ret i32* @sum1
 }