Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5
2018-12-21 19:01:49 +00:00
parent 32d52ae4ca
commit f32dbaf0b2
28477 changed files with 3866961 additions and 38 deletions
--- a/external/llvm/test/Transforms/LowerSwitch/phi-in-dead-block.ll
+++ b/external/llvm/test/Transforms/LowerSwitch/phi-in-dead-block.ll
@@ -0,0 +1,40 @@
+; RUN: opt -S -lowerswitch %s | FileCheck %s
+
+; CHECK-LABEL: @phi_in_dead_block(
+; CHECK-NOT: switch
+define void @phi_in_dead_block() {
+bb:
+  br i1 undef, label %bb2, label %bb3
+
+bb1:                                              ; No predecessors!
+  switch i32 undef, label %bb2 [
+    i32 9, label %bb3
+  ]
+
+bb2:                                              ; preds = %bb1, %bb
+  %tmp = phi i64 [ undef, %bb1 ], [ undef, %bb ]
+  unreachable
+
+bb3:                                              ; preds = %bb1, %bb
+  unreachable
+}
+
+; CHECK-LABEL: @phi_in_dead_block_br_to_self(
+; CHECK-NOT: switch
+define void @phi_in_dead_block_br_to_self() {
+bb:
+  br i1 undef, label %bb2, label %bb3
+
+bb1:                                              ; No predecessors!
+  switch i32 undef, label %bb2 [
+    i32 9, label %bb3
+    i32 10, label %bb1
+  ]
+
+bb2:                                              ; preds = %bb1, %bb
+  %tmp = phi i64 [ undef, %bb1 ], [ undef, %bb ]
+  unreachable
+
+bb3:                                              ; preds = %bb1, %bb
+  unreachable
+}