1 files changed, 25 insertions, 0 deletions
diff --git a/llvm/test/Transforms/CodeGenPrepare/X86/multi-extension.ll b/llvm/test/Transforms/CodeGenPrepare/X86/multi-extension.ll
new file mode 100644
index 00000000000..950f9f2e04a
--- /dev/null
+++ b/llvm/test/Transforms/CodeGenPrepare/X86/multi-extension.ll
@@ -0,0 +1,25 @@
+; RUN: opt < %s -codegenprepare -S -mtriple=x86_64-unknown-unknown    | FileCheck %s
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.13.0"
+
+declare void @bar(i64)
+
+@b = global i16 0, align 2
+
+; This test case is extracted from PR38125.
+; %or is reachable by both a sext and zext that are going to be promoted.
+; It ensures correct operation on PromotedInsts.
+
+; CHECK:       %promoted = trunc i32 %or to i16
+; CHECK-NEXT:  %c = sext i16 %promoted to i64
+define i32 @foo(i16 %kkk) {
+entry:
+  %t4 = load i16, i16* @b, align 2
+  %conv4 = zext i16 %t4 to i32
+  %or = or i16 %kkk, %t4
+  %c = sext i16 %or to i64
+  call void @bar(i64 %c)
+  %t5 = and i16 %or, 5
+  %z = zext i16 %t5 to i32
+  ret i32 %z
+}