================
@@ -0,0 +1,14 @@
+// RUN: mlir-translate -mlir-to-llvmir %s | FileCheck %s
+
+// CHECK: define void @disable_tail_calls() #[[ATTRS_TRUE:.*]] {
+llvm.func @disable_tail_calls() attributes {disable_tail_calls = true} {
+ llvm.return
+}
+
+// CHECK: define void @disable_tail_calls_false() #[[ATTRS_FALSE:.*]] {
+llvm.func @disable_tail_calls_false() attributes {disable_tail_calls = false} {
----------------
kaviya2510 wrote:
Clang does not emit `disable-tail-calls=false` with `-foptimize-sibling-calls`.
it emits the attribute only when tail-call optimization is explicitly disabled
through `-fno-optimize-siblings-calls` and flang has the same behavior as clang.
The `"disable_tail_calls = false"` case in this testcase only verifies the
behavior when `disable_tail_calls = false` is explicitly specified in MLIR. The
purpose of this test is to ensure that the LLVM dialect exposes the attribute
and lowers it correctly to LLVM IR.
https://github.com/llvm/llvm-project/pull/216650
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