MIR: Support MachineMemOperands without associated value

This is allowed (though used rarely) and useful to keep your tests
short.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@271752 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 15 insertions, 24 deletions

diff --git a/test/CodeGen/MIR/X86/expected-from-in-memory-operand.mir b/test/CodeGen/MIR/X86/expected-from-in-memory-operand.mir
deleted file mode 100644
index f9e9d0b2296..00000000000
--- a/test/CodeGen/MIR/X86/expected-from-in-memory-operand.mir
+++ /dev/null
@@ -1,24 +0,0 @@
-# RUN: not llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s 2>&1 | FileCheck %s
-
---- |
-
-  define i32 @test(i32* %a) {
-  entry:
-    %b = load i32, i32* %a
-    ret i32 %b
-  }
-
-...
----
-name:            test
-tracksRegLiveness: true
-liveins:
-  - { reg: '%rdi' }
-body: |
-  bb.0.entry:
-    liveins: %rdi
-  ; CHECK: [[@LINE+1]]:55: expected 'from'
-    %eax = MOV32rm killed %rdi, 1, _, 0, _ :: (load 4 %ir.a)
-    RETQ %eax
-...
-
diff --git a/test/CodeGen/MIR/X86/memory-operands.mir b/test/CodeGen/MIR/X86/memory-operands.mir
index 1f295df7551..0cf74ddbe70 100644
--- a/test/CodeGen/MIR/X86/memory-operands.mir
+++ b/test/CodeGen/MIR/X86/memory-operands.mir
@@ -186,6 +186,10 @@
     %0 = load i8*, i8** undef, align 8
     ret i8* %0
   }
+
+  define void @dummy() {
+    ret void
+  }
 ...
 ---
 name:            test
@@ -506,3 +510,14 @@ body: |
     %rax = MOV64rm undef %rax, 1, _, 0, _ :: (load 8 from `i8** undef`)
     RETQ %rax
 ...
+---
+# Test memory operand without associated value.
+# CHECK-LABEL: name: dummy
+# CHECK: %rax = MOV64rm undef %rax, 1, _, 0, _ :: (load 8)
+name: dummy
+tracksRegLiveness: true
+body: |
+  bb.0:
+    %rax = MOV64rm undef %rax, 1, _, 0, _ :: (load 8)
+    RETQ %rax
+...