--- /dev/null
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
+;
+; FIXME: two consecutive immediate adds not fused in i16/i8 functions.
+
+declare i64 @llvm.ctlz.i64(i64, i1)
+declare i32 @llvm.ctlz.i32(i32, i1)
+declare i16 @llvm.ctlz.i16(i16, i1)
+declare i8 @llvm.ctlz.i8(i8, i1)
+
+define i64 @f0(i64 %arg) {
+; CHECK-LABEL: f0:
+; CHECK-LABEL: %bb.0:
+; CHECK-NOT: %bb.1:
+; CHECK: flogr
+ %1 = tail call i64 @llvm.ctlz.i64(i64 %arg, i1 false)
+ ret i64 %1
+}
+
+define i64 @f1(i64 %arg) {
+; CHECK-LABEL: f1:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: flogr
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i64 @llvm.ctlz.i64(i64 %arg, i1 true)
+ ret i64 %1
+}
+
+define i32 @f2(i32 %arg) {
+; CHECK-LABEL: f2:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: llgfr %r0, %r2
+; CHECK-NEXT: flogr %r2, %r0
+; CHECK-NEXT: aghi %r2, -32
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i32 @llvm.ctlz.i32(i32 %arg, i1 false)
+ ret i32 %1
+}
+
+define i32 @f3(i32 %arg) {
+; CHECK-LABEL: f3:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: llgfr %r0, %r2
+; CHECK-NEXT: flogr %r2, %r0
+; CHECK-NEXT: aghi %r2, -32
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i32 @llvm.ctlz.i32(i32 %arg, i1 true)
+ ret i32 %1
+}
+
+define i16 @f4(i16 %arg) {
+; CHECK-LABEL: f4:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: # kill
+; CHECK-NEXT: llghr %r0, %r2
+; CHECK-NEXT: flogr %r2, %r0
+; CHECK-NEXT: aghi %r2, -32
+; CHECK-NEXT: ahi %r2, -16
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i16 @llvm.ctlz.i16(i16 %arg, i1 false)
+ ret i16 %1
+}
+
+define i16 @f5(i16 %arg) {
+; CHECK-LABEL: f5:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: # kill
+; CHECK-NEXT: llghr %r0, %r2
+; CHECK-NEXT: flogr %r2, %r0
+; CHECK-NEXT: aghi %r2, -32
+; CHECK-NEXT: ahi %r2, -16
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i16 @llvm.ctlz.i16(i16 %arg, i1 true)
+ ret i16 %1
+}
+
+define i8 @f6(i8 %arg) {
+; CHECK-LABEL: f6:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: # kill
+; CHECK-NEXT: llgcr %r0, %r2
+; CHECK-NEXT: flogr %r2, %r0
+; CHECK-NEXT: aghi %r2, -32
+; CHECK-NEXT: ahi %r2, -24
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i8 @llvm.ctlz.i8(i8 %arg, i1 false)
+ ret i8 %1
+}
+
+define i8 @f7(i8 %arg) {
+; CHECK-LABEL: f7:
+; CHECK-LABEL: %bb.0:
+; CHECK-NEXT: # kill
+; CHECK-NEXT: llgcr %r0, %r2
+; CHECK-NEXT: flogr %r2, %r0
+; CHECK-NEXT: aghi %r2, -32
+; CHECK-NEXT: ahi %r2, -24
+; CHECK-NEXT: # kill
+; CHECK-NEXT: br %r14
+ %1 = tail call i8 @llvm.ctlz.i8(i8 %arg, i1 true)
+ ret i8 %1
+}