1 files changed, 22 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/pr23809.ll b/test/Transforms/InstCombine/pr23809.ll
new file mode 100644
index 0000000000000..06c7ce20ba807
--- /dev/null
+++ b/test/Transforms/InstCombine/pr23809.ll
@@ -0,0 +1,22 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; InstCombine should preserve the call to @llvm.assume.
+define i32 @icmp(i32 %a, i32 %b) {
+; CHECK-LABEL: @icmp(
+  %sum = add i32 %a, %b
+  %1 = icmp sge i32 %sum, 0
+  call void @llvm.assume(i1 %1)
+; CHECK: call void @llvm.assume
+  ret i32 %sum
+}
+
+define float @fcmp(float %a, float %b) {
+; CHECK-LABEL: @fcmp(
+  %sum = fadd float %a, %b
+  %1 = fcmp oge float %sum, 0.0
+  call void @llvm.assume(i1 %1)
+; CHECK: call void @llvm.assume
+  ret float %sum
+}
+
+declare void @llvm.assume(i1)