Summary: This patch adds support to preserve make.implicit metadata for unswitched conditions in loop pre-header.
Reviewers: sanjoy, weimingz
Subscribers: mcrosier, llvm-commits
Differential Revision: http://reviews.llvm.org/D11769
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244132
91177308-0d34-0410-b5e6-
96231b3b80d8
}
}
// fallthrough.
+ case LLVMContext::MD_make_implicit:
case LLVMContext::MD_dbg:
DstInst->setMetadata(MD.first, MD.second);
}
--- /dev/null
+; RUN: opt < %s -loop-unswitch -S < %s 2>&1 | FileCheck %s
+
+; This test checks if unswitched condition preserve make.implicit metadata.
+
+define i32 @test(i1 %cond) {
+; CHECK: br i1 %cond, label %..split_crit_edge, label %.loop_exit.split_crit_edge, !make.implicit !0
+ br label %loop_begin
+
+loop_begin:
+; CHECK: br i1 true, label %continue, label %loop_exit, !make.implicit !0
+ br i1 %cond, label %continue, label %loop_exit, !make.implicit !0
+
+continue:
+ call void @some_func()
+ br label %loop_begin
+
+loop_exit:
+ ret i32 0
+}
+
+declare void @some_func()
+
+!0 = !{}