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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -S -passes=instcombine < %s | FileCheck %s3 4; This test used to cause an infinite combine loop.5 6define i16 @passthru(i16 returned %x) {7; CHECK-LABEL: @passthru(8; CHECK-NEXT:    ret i16 [[X:%.*]]9;10  ret i16 %x11}12 13define i16 @test(i16 %arg) {14; CHECK-LABEL: @test(15; CHECK-NEXT:    [[ZERO:%.*]] = call i16 @passthru(i16 0)16; CHECK-NEXT:    [[RET:%.*]] = call i16 @llvm.smax.i16(i16 [[ARG:%.*]], i16 0)17; CHECK-NEXT:    ret i16 [[RET]]18;19  %zero = call i16 @passthru(i16 0)20  %sub = sub nuw nsw i16 %arg, %zero21  %cmp = icmp slt i16 %sub, 022  %ret = select i1 %cmp, i16 0, i16 %sub23  ret i16 %ret24}25