Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/X86/scavenger.mir

@@ -0,0 +1,49 @@
+# RUN: llc -mtriple=i386-- -run-pass scavenger-test -verify-machineinstrs -o - %s | FileCheck %s
+---
+# CHECK-LABEL: name: func0
+name: func0
+tracksRegLiveness: true
+body: |
+  bb.0:
+    ; CHECK: [[REG0:%e[a-z]+]] = MOV32ri 42
+    ; CHECK: %ebp = COPY killed [[REG0]]
+    %0 : gr32 = MOV32ri 42
+    %ebp = COPY %0
+...
+---
+# CHECK-LABEL: name: func2
+name: func2
+tracksRegLiveness: true
+body: |
+  bb.0:
+    ; CHECK-NOT: %eax = MOV32ri 42
+    ; CHECK: [[REG0:%e[a-z]+]] = MOV32ri 42
+    ; CHECK: %ebp = COPY killed [[REG0]]
+    %eax = MOV32ri 13
+    %0 : gr32 = MOV32ri 42
+    %ebp = COPY %0
+
+    ; CHECK: [[REG1:%e[a-z]+]] = MOV32ri 23
+    ; CHECK: [[REG2:%e[a-z]+]] = MOV32ri 7
+    ; CHECK: [[REG1]] = ADD32ri8 [[REG1]], 5, implicit-def dead %eflags
+    %1 : gr32 = MOV32ri 23
+    %2 : gr32 = MOV32ri 7
+    %1 = ADD32ri8 %1, 5, implicit-def dead %eflags
+
+    NOOP implicit %ebp
+
+    ; CHECK: NOOP implicit killed [[REG2]]
+    ; CHECK: NOOP implicit killed [[REG1]]
+    NOOP implicit %2
+    NOOP implicit %1
+    RETQ %eax
+...
+---
+# CHECK-LABEL: name: func3
+name: func3
+tracksRegLiveness: true
+body: |
+  bb.0:
+    ; CHECK dead {{%e[a-z]+}} = MOV32ri 42
+    dead %0 : gr32 = MOV32ri 42
+...