[llvm] SystemZ: Handle gr128 to fp128 copies in copyPhysReg (PR #90861)

[Ulrich Weigand via llvm-commits]

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@@ -0,0 +1,82 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
+# RUN: llc -mtriple=s390x-ibm-linux -mcpu=z13 -run-pass=postrapseudos -verify-machineinstrs -o - %s | FileCheck %s
+
+---
+name:            copy_gr128_to_fp128__r0q_to_f0q
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $r0q
+    ; CHECK-LABEL: name: copy_gr128_to_fp128__r0q_to_f0q
+    ; CHECK: liveins: $r0q
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: $f0d = LDGR $r0d, implicit-def $f0q
+    ; CHECK-NEXT: $f2d = LDGR $r1d
+    ; CHECK-NEXT: Return implicit $f0q
+    $f0q = COPY $r0q
+    Return implicit $f0q
+...
+
+---
+name:            copy_gr128_to_fp128__r0q_to_f0q_killed
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $r0q
+    ; CHECK-LABEL: name: copy_gr128_to_fp128__r0q_to_f0q_killed
+    ; CHECK: liveins: $r0q
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: $f0d = LDGR $r0d, implicit-def $f0q
+    ; CHECK-NEXT: $f2d = LDGR killed $r1d
+    ; CHECK-NEXT: Return implicit $f0q
+    $f0q = COPY killed $r0q
+    Return implicit $f0q
+...
+
+---
+name:            copy_gr128_to_fp128__r0q_to_f0q_undef
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $r0q
+    ; CHECK-LABEL: name: copy_gr128_to_fp128__r0q_to_f0q_undef
+    ; CHECK: liveins: $r0q
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: $f0q = KILL undef $r0q
+    ; CHECK-NEXT: Return implicit $f0q
+    $f0q = COPY undef $r0q
+    Return implicit $f0q
+...
+
+---
+name:            copy_gr128_to_fp128__r0q_to_f0q_subreg0
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $r0q
+    ; CHECK-LABEL: name: copy_gr128_to_fp128__r0q_to_f0q_subreg0
+    ; CHECK: liveins: $r0q
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: $f0d = LDGR $r0d, implicit-def $f0q
+    ; CHECK-NEXT: $f2d = LDGR $r1d
+    ; CHECK-NEXT: Return implicit $f0q
+    $f0q = COPY $r0q
+    Return implicit $f0q
+...
+
+---
+name:            copy_gr128_to_fp128__r0q_to_f0q_subreg1
----------------
uweigand wrote:

Same here.

https://github.com/llvm/llvm-project/pull/90861