Vendor import of llvm trunk r351319 (just before the release_80 branchvendor/llvm/llvm-trunk-r351319

point):
https://llvm.org/svn/llvm-project/llvm/trunk@351319

1 files changed, 27 insertions, 0 deletions

diff --git a/test/CodeGen/X86/twoaddr-dbg-value.mir b/test/CodeGen/X86/twoaddr-dbg-value.mir
new file mode 100644
index 000000000000..f2d6c5df5822
--- /dev/null
+++ b/test/CodeGen/X86/twoaddr-dbg-value.mir
@@ -0,0 +1,27 @@
+# RUN: llc -run-pass=livevars,twoaddressinstruction -mtriple=x86_64-- -o - %s | FileCheck %s
+---
+name:            foo
+tracksRegLiveness: true
+body:             |
+  bb.0:
+    liveins: $edi
+
+    %0:gr32 = COPY killed $edi
+    %1:gr32 = COPY killed %0
+    %4:gr32 = XOR32ri8 %1, 1, implicit-def dead $eflags
+    DBG_VALUE %4
+    %5:gr32 = COPY %4
+    PUSH32r killed %1, implicit-def $esp, implicit $esp
+    $eax = COPY killed %5
+    RETQ implicit killed $eax
+
+...
+
+# Verify that the DBG_VALUE instruction does not inhibit
+# TwoAddressInstructionPass::rescheduleMIBelowKill optimization
+
+# CHECK: PUSH32r %1, implicit-def $esp, implicit $esp
+# CHECK-NEXT: %2:gr32 = COPY killed %1
+# CHECK-NEXT: %2:gr32 = XOR32ri8 %2, 1, implicit-def dead $eflags
+# CHECK-NEXT: DBG_VALUE %2
+# CHECK-NEXT: %3:gr32 = COPY killed %2