Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/Bitcode/metadata-function-blocks.ll

@@ -0,0 +1,78 @@
+; RUN: llvm-as < %s -bitcode-mdindex-threshold=0 | llvm-bcanalyzer -dump | FileCheck %s
+; Test that metadata only used by a single function is serialized in that
+; function instead of in the global pool.
+;
+; In order to make the bitcode records easy to follow, nodes in this testcase
+; are named after the ids they are given in the bitcode.  Nodes local to a
+; function have offsets of 100 or 200 (depending on the function) so that they
+; remain unique within this textual IR.
+
+; Check for strings in the global pool.
+; CHECK:      <METADATA_BLOCK
+; CHECK-NEXT:   <STRINGS
+; CHECK-SAME:           /> num-strings = 3 {
+; CHECK-NEXT:     'named'
+; CHECK-NEXT:     'named and foo'
+; CHECK-NEXT:     'foo and bar'
+; CHECK-NEXT:   }
+
+; Each node gets a new number.  Bottom-up traversal of nodes.
+!named = !{!6}
+
+; Before the records we emit an offset to the index for the block
+; CHECK-NEXT:   <INDEX_OFFSET
+
+; CHECK-NEXT:   <NODE op0=1/>
+!4 = !{!"named"}
+
+; CHECK-NEXT:   <NODE op0=2/>
+!5 = !{!"named and foo"}
+
+; CHECK-NEXT:   <NODE op0=1 op1=4 op2=5/>
+!6 = !{!"named", !4, !5}
+
+; CHECK-NEXT:   <NODE op0=3/>
+!7 = !{!"foo and bar"}
+
+; CHECK-NOT:    <NODE
+; CHECK:      </METADATA_BLOCK
+
+; Look at metadata local to @foo, starting with strings.
+; CHECK:      <FUNCTION_BLOCK
+; CHECK:        <METADATA_BLOCK
+; CHECK-NEXT:     <STRINGS
+; CHECK-SAME:             /> num-strings = 1 {
+; CHECK-NEXT:       'foo'
+; CHECK-NEXT:     }
+
+; Function-local nodes start at 9 (strings at 8).
+; CHECK-NEXT:     <NODE op0=8/>
+!109 = !{!"foo"}
+
+; CHECK-NEXT:     <NODE op0=8 op1=3 op2=9 op3=7 op4=5/>
+!110 = !{!"foo", !"foo and bar", !109, !7, !5}
+
+; CHECK-NEXT:   </METADATA_BLOCK
+define void @foo() !foo !110 {
+  unreachable
+}
+
+; Look at metadata local to @bar, starting with strings.
+; CHECK:    <FUNCTION_BLOCK
+; CHECK:      <METADATA_BLOCK
+; CHECK-NEXT:   <STRINGS
+; CHECK-SAME:           /> num-strings = 1 {
+; CHECK-NEXT:     'bar'
+; CHECK-NEXT:   }
+
+; Function-local nodes start at 9 (strings at 8).
+; CHECK-NEXT:   <NODE op0=8/>
+!209 = !{!"bar"}
+
+; CHECK-NEXT:   <NODE op0=8 op1=3 op2=9 op3=7/>
+!210 = !{!"bar", !"foo and bar", !209, !7}
+
+; CHECK-NEXT: </METADATA_BLOCK
+define void @bar() {
+  unreachable, !bar !210
+}