Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/ARM/tail-call-builtin.ll

@@ -0,0 +1,37 @@
+; RUN: llc -mtriple=thumbv7-linux-gnueabihf %s -o - | FileCheck %s
+
+define i64 @test_mismatched_call(double %in) {
+; CHECK-LABEL: test_mismatched_call:
+; CHECK: bl floor
+; CHECK: vmov r0, r1, d0
+
+  %val = tail call double @floor(double %in)
+  %res = bitcast double %val to i64
+  ret i64 %res
+}
+
+define double @test_matched_call(double %in) {
+; CHECK-LABEL: test_matched_call:
+; CHECK: b floor
+
+  %val = tail call double @floor(double %in)
+  ret double %val
+}
+
+define void @test_irrelevant_call(double %in) {
+; CHECK-LABEL: test_irrelevant_call:
+; CHECK-NOT: bl floor
+
+  %val = tail call double @floor(double %in)
+  ret void
+}
+
+define arm_aapcscc double @test_callingconv(double %in) {
+; CHECK: test_callingconv:
+; CHECK: bl floor
+
+  %val = tail call double @floor(double %in)
+  ret double %val
+}
+
+declare double @floor(double) nounwind readonly