1 files changed, 42 insertions, 0 deletions
diff --git a/test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir b/test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir
new file mode 100644
index 000000000000..64af6121189a
--- /dev/null
+++ b/test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir
@@ -0,0 +1,42 @@
+# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s | FileCheck %s
+# This test ensures that the MIR parser parses basic block successors and
+# probabilities correctly.
+
+--- |
+
+  define i32 @foo(i32 %a) {
+  entry:
+    %0 = icmp sle i32 %a, 10
+    br i1 %0, label %less, label %exit
+
+  less:
+    ret i32 0
+
+  exit:
+    ret i32 %a
+  }
+
+...
+---
+name:            foo
+body: |
+  ; CHECK-LABEL: bb.0.entry:
+  ; CHECK:         successors: %bb.1.less({{[0-9a-fx/= ]+}}33.00%), %bb.2.exit({{[0-9a-fx/= ]+}}67.00%)
+  ; CHECK-LABEL: bb.1.less:
+  bb.0.entry:
+    successors: %bb.1.less (33), %bb.2.exit(67)
+    liveins: %edi
+
+    CMP32ri8 %edi, 10, implicit-def %eflags
+    JG_1 %bb.2.exit, implicit killed %eflags
+
+  bb.1.less:
+    %eax = MOV32r0 implicit-def dead %eflags
+    RETQ killed %eax
+
+  bb.2.exit:
+    liveins: %edi
+
+    %eax = COPY killed %edi
+    RETQ killed %eax
+...