1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -instcombine -instcombine-infinite-loop-threshold=2 < %s | FileCheck %s
4 ; This test used to cause an infinite combine loop.
6 define i16 @passthru(i16 returned %x) {
7 ; CHECK-LABEL: @passthru(
8 ; CHECK-NEXT: ret i16 [[X:%.*]]
13 define i16 @test(i16 %arg) {
15 ; CHECK-NEXT: [[ZERO:%.*]] = call i16 @passthru(i16 0)
16 ; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i16 [[ARG:%.*]], 0
17 ; CHECK-NEXT: [[RET:%.*]] = select i1 [[TMP1]], i16 [[ARG]], i16 0
18 ; CHECK-NEXT: ret i16 [[RET]]
20 %zero = call i16 @passthru(i16 0)
21 %sub = sub nuw nsw i16 %arg, %zero
22 %cmp = icmp slt i16 %sub, 0
23 %ret = select i1 %cmp, i16 0, i16 %sub